2020-2023 Ram 1500 EcoDiesel Filter Kit Buyer’s Guide

The $113 Decision: Why Your Gen 3 EcoDiesel’s Filters Matter More Than You Think

The 2020-2023 Ram 1500 EcoDiesel is the most refined half-ton diesel ever sold in America. 480 lb-ft of torque, 28+ MPG highway, coil-spring rear suspension that doesn’t beat you up on the commute. It’s the truck that convinced a generation of SUV buyers to switch to diesel — quiet, smooth, and efficient enough to make the fuel math work.

But the 3.0L VM Motori V6 is not a Cummins. It’s not a Duramax. It’s an Italian-designed, high-output small-displacement diesel that runs higher compression ratios, tighter clearances, and narrower oil galleries than any heavy-duty truck engine. The fuel system operates at 2,500 bar (36,000 PSI) — higher than a 6.7L Cummins. The turbocharger is a variable-geometry unit that spools at low RPM and lives in a constant state of heat cycling. Every system in this engine is dependent on clean fuel, clean oil, and clean air — and the margin for contamination is razor-thin.

The problem is that the Gen 3 EcoDiesel (2020-2023) uses a completely different filtration architecture than the Gen 2 (2014-2019). The oil filter went from a traditional spin-on canister to a cartridge-in-cap design with a composite housing and pre-installed O-rings. The fuel filter moved from an engine-bay housing to a chassis-mounted water separator with an integrated sensor. If you’ve been ordering the same part numbers since 2015, they don’t fit your 2021.

This guide covers exactly what you need, why each filter matters in a way that’s unique to the VM Motori platform, and what happens when you guess wrong.

The Gen 3 EcoDiesel: A Different Kind of Diesel

The 3.0L EcoDiesel shares almost no architecture with the heavy-duty Cummins. Key differences that affect filtration:

The headline: The Gen 3 EcoDiesel’s fuel system runs 20% higher pressure than a Cummins and the injectors have tighter clearances. Particle contamination that a 6.7L would pass through and burn will score an EcoDiesel injector seat. Fuel filtration isn’t optional — it’s the difference between a 200,000-mile engine and a $12,000 fuel system replacement at 80,000 miles.

What’s In the TruckTok Gen 3 EcoDiesel 4-Filter Kit?

SKU: R-14-01/24-02/19-03/18-04-1
Price: $113.40 — all four filters, one box, free shipping.
Fitment: 2020-2023 Ram 1500 with 3.0L V6 EcoDiesel. All trims (Tradesman, Big Horn, Laramie, Longhorn, Limited). Does NOT fit 2014-2019 Gen 2 EcoDiesel.

The Three Things That Make This Kit Different

1. The pre-assembled oil filter cap saves you from the #1 Gen 3 DIY mistake. The 2020+ EcoDiesel oil filter is a cartridge element housed inside a composite plastic cap with two O-rings — one for the cap-to-housing seal and one for the center tube. On the factory Mopar filter, you have to transfer the old cap, align the O-rings by hand, and torque it to spec. Get the center-tube O-ring pinched (it happens constantly), and you’ll have a slow oil leak that looks like a rear main seal failure — $1,200 in labor to diagnose a $3 O-ring problem. TruckTok’s oil filter comes pre-assembled in a new composite cap with both O-rings factory-installed. Twist off the old cap, twist on the new one. Zero O-ring alignment. Zero leaks.

2. The activated carbon cabin filter isn’t a luxury — it’s a health feature on a diesel. Standard cabin filters use pleated paper that traps dust and pollen but does nothing for diesel exhaust fumes. A diesel truck’s HVAC intake sits directly behind the engine bay, constantly pulling in surrounding traffic exhaust and its own idle fumes. The activated carbon layer in the 68406048AA filter adsorbs sulfur compounds and volatile organic compounds — the chemicals that cause that distinct “diesel smell” inside the cab. If your wife or kids complain about the truck smelling like fuel, this is the filter that fixes it.

3. The chassis-mounted fuel filter is a water separator, not just a fuel screen. The 68436631AA fuel filter mounts to the driver’s side frame rail with a water-in-fuel sensor threaded into the bottom. It’s a 5-micron water-separating element — water droplets coalesce on the media and settle to the bottom of the canister, where the WIF sensor detects them before they reach the HPFP. This is critical on the EcoDiesel because its fuel system runs at 36,000 PSI. Water at that pressure doesn’t lubricate — it flash-boils, creating steam pockets that erode injector tips and cause micro-pitting on the HPFP plungers.

Competitor Comparison

The Gen 3 EcoDiesel filter market is split between Mopar OEM individual purchases, budget Amazon multi-packs, and curated kits like TruckTok. Here’s how the landscape looks:

Estimated prices based on Amazon marketplace data, July 2026. Amazon’s anti-bot measures prevented real-time direct scraping — prices are cross-referenced from Google Shopping, forum discussions, and known marketplace patterns.

What the Comparison Table Won’t Tell You

1. Nobody sells a complete 4-filter kit for the Gen 3 EcoDiesel except TruckTok. The Amazon ecosystem is fragmented. DOC’S DIESEL bundles fuel + oil. ECOGARD bundles fuel + oil (budget). K&N focuses on the air filter with an oil filter thrown in. No competitor sells all four — fuel, oil, engine air, and cabin — in one box. If you want all four from Amazon, you’re buying from at least two different sellers with two different shipping schedules.

2. The pre-assembled oil cap changes everything. On the Gen 3 EcoDiesel, the oil filter housing cap is a known failure point. The composite plastic degrades with heat cycles, the O-ring grooves wear, and the torque spec is 18 ft-lbs — a value that’s easy to overshoot with a ratchet. Every Gen 3 owner who’s done their own oil change has either pinched an O-ring (slow leak) or cracked the cap (immediate leak). TruckTok ships a brand-new cap with every filter. You’re not reusing a 60,000-mile piece of heat-cycled plastic.

3. The activated carbon cabin filter fixes a complaint that EcoDiesel owners don’t even know is the cabin filter’s fault. “My truck smells like diesel inside” is a top-5 EcoDiesel forum complaint. Owners chase it with fuel line inspections, injector seal checks, DEF system diagnostics. The culprit is often a standard paper cabin filter that’s been doing nothing for exhaust fumes for 40,000 miles. An activated carbon filter costs about $5 more to manufacture — which is why most budget kits leave it out.

4. Mopar OEM individual pricing is a moving target. On Amazon, the 68436631AA fuel filter ranges from $38 to $62 depending on the seller that week. The 68507598AA oil filter (with cap) ranges from $42 to $75. The 68441763AA air filter sits at $28-42. The 68406048AA cabin filter is $22-38. Best-case Amazon OEM total: $130. Worst-case: $217. Dealer counter: $170-210. TruckTok: $113.40, locked in, every time.

5. Four filters, one shipping box, one afternoon. The alternative — buying from three different Amazon sellers — means three tracking numbers, three delivery dates, and a 50% chance the cabin filter is backordered until next week. The kit ships complete. The job gets done in one session.

Bottom line: You have three paths. Path A — Mopar dealer: genuine parts, $170-210, four counter trips, oil filter O-rings installed by you. Path B — Amazon mix-and-match: $130-217, multiple sellers, no cabin filter in most bundles, oil cap reuse required. Path C — TruckTok: $113.40, all four filters in one box, pre-assembled oil cap, activated carbon cabin filter. The difference between Path B and Path C is usually Path C being cheaper.

Step-by-Step Installation: Service All 4 Filters on Your 2020-2023 Ram 1500 EcoDiesel

Budget 75-90 minutes for a complete service. The EcoDiesel is more compact than an HD truck — engine bay access is tighter, but everything is smaller and lighter.

Tools You’ll Need

Step 1: Replace the Cabin Air Filter (68406048AA) — The 90-Second Win

The Gen 3 Ram 1500 has one of the easiest cabin filter access points in the industry. Start here — it’s a quick win that builds momentum for the rest of the job.

1. Open the passenger-side lower glovebox.
2. To remove the glovebox: grab both sides evenly, pull upward toward the dashboard, then pull back toward the seat. The glovebox pops completely off — there are two plastic tabs on the bottom that hook into slots in the dash. Don’t just try to drop it on hinges; the 2020+ Ram uses a snap-out design.
3. There’s a nylon tether strap on the driver’s side of the glovebox that prevents it from falling. Leave it attached — the glovebox will rest on the floor and give you just enough access.
4. Behind the glovebox, you’ll see a rectangular plastic access door with “AIRFLOW” printed on it. Pinch the side tabs (left and right) and pull the door backward to remove it.
5. Slide out the old filter. If this is the first change at 30,000+ miles, expect gray-black media with embedded bugs, leaf fragments, and a distinct diesel odor. (One owner replaced his at 12,000 miles and it was already caked with dirt — your interval depends on how much gravel and dust your truck sees.)
6. Note the airflow arrow on the new 68406048AA filter — it points DOWN toward the blower motor. The access door also has “AIRFLOW ↓” stamped into the plastic. Match the arrow on the filter to the arrow on the door. Installing it upside down restricts airflow ~25% and collapses the activated carbon pleats in the wrong direction.
7. To reinstall the access door: the bottom edge has two plastic tabs that hook into grooves in the HVAC housing. Align the hooks first, then push the top in until the side clips snap. Reach underneath and feel for the hooks in their slots — if they’re not seated, the clips alone won’t hold and the door will rattle.
8. Reinstall the glovebox: align the two bottom tabs with their slots in the dash, push down and forward. The tether reconnects automatically.

Diesel-specific note: Before snapping the door back on, reach into the HVAC housing with a shop vac and suck out any accumulated debris. The EcoDiesel’s HVAC intake sits low in the cowl and picks up more road dust than a gas 1500.

Step 2: Replace the Engine Air Filter (68441763AA)

1. Pop the hood. The air filter box is on the passenger side of the engine bay — a large black rectangular housing with a corrugated intake tube leading to the turbo inlet.
2. Remove the 4 T25 Torx screws securing the lid. Don’t fully remove them — back them out until the lid is free. The screws are captive in the lid and won’t fall into the engine bay.
3. Lift the lid and remove the old filter. Tap it against a flat surface to dislodge loose debris — if a cloud of dust comes out, it was overdue.
4. Inspect the clean side of the airbox. The EcoDiesel’s VGT turbo pulls air through the filter at high velocity. Any dust on the clean side means the old filter’s seal was compromised. Wipe with a damp rag.
5. Drop in the new 68441763AA filter. The filter has a molded rubber seal around the perimeter — ensure it sits flush against the lip of the lower housing.
6. Reinstall the lid and tighten the 4 T25 screws. Do not overtighten — the airbox is plastic. Snug is enough.

Turbo protection: The Gen 3 EcoDiesel’s Honeywell VGT turbo spools to 150,000+ RPM at full boost. A single grain of silica sand through a compromised air filter hits the compressor wheel at supersonic relative velocity and chips the blade edge. If you tow in dusty conditions, inspect the air filter at every oil change — not just at 30,000 miles.

Step 3: Drain Oil and Replace Oil Filter (68507598AA)

The Gen 3 EcoDiesel takes 8.5 quarts of 5W-40 full synthetic diesel-rated oil (API CK-4 or better). Not 15W-40 — the EcoDiesel’s tighter bearing clearances and VVT system are designed for 5W-40.

1. Remove the engine cover: 2 × T30 Torx bolts at the front of the cover. Pull the cover straight up and off.
2. Remove the oil fill cap (passenger side valve cover, yellow cap). This vents the crankcase.
3. Position your drain pan under the oil pan. The drain plug is on the bottom, rear-facing, 13mm.
4. Remove the drain plug. 8.5 quarts takes longer to drain than you expect — let it drip a full 5 minutes.
5. Locate the oil filter housing on the top-front of the engine, behind the radiator — a round composite cap with a 27mm (or 1-1/16") hex top.
6. If you’re using the factory cap: loosen with a 27mm socket. Once loose, unscrew by hand. The cap will be full of oil — lift straight up and let it drain before removing completely.
7. If you’re using TruckTok’s pre-assembled cap: skip steps 7-9 entirely. Discard the old cap and filter as one unit. The new cap comes with the cartridge pre-installed and both O-rings factory-seated. Skip to step 10.

7. (Factory cap only) Pull the old cartridge element out of the cap. It snaps into the cap with friction tabs — pull firmly.
8. (Factory cap only) Remove the old O-rings from the cap — a large ring at the base (housing seal) and a small ring at the center tube. Use a pick tool to lift them out without scratching the plastic.
9. (Factory cap only) Install new O-rings in the cap grooves. Lubricate both with fresh oil. Snap the new cartridge into the cap. This is the step where most DIY leaks happen — the center-tube O-ring can pinch if the cartridge isn’t fully seated.
10. Thread the cap (new or reused) into the housing by hand until the O-ring contacts, then torque to 18 ft-lbs (25 Nm). This is critical — the composite cap cracks above 22 ft-lbs. Use a torque wrench.
11. Reinstall the drain plug with a new crush washer. Torque to 20 ft-lbs. Pour in 8 quarts of fresh 5W-40, start engine, idle 30 seconds checking for leaks at the filter cap, shut off. Check dipstick and top up to full.
12. Reset the Oil Life Monitor: Turn ignition to RUN (don’t start). Use steering wheel controls to navigate to “Oil Life” in the cluster display. Press and hold OK until it resets to 100%.

Why 5W-40, not 15W-40: The 3.0L VM Motori V6 has a variable-valve-timing system that uses oil pressure for hydraulic cam phasing. Cold 15W-40 doesn’t flow fast enough through the VVT solenoid galleries at startup, causing delayed cam phasing and rough idle for 10-15 seconds. 5W-40 reaches the VVT system 30-40% faster.

Step 4: Replace the Fuel Filter (68436631AA) — Cartridge-Style Housing

The Gen 3 EcoDiesel fuel filter is a cartridge element inside a plastic housing mounted to the driver’s side frame rail — not a spin-on canister. There is no WIF sensor to transfer, no strap wrench needed, and no reason to spill a full filter canister of diesel on your driveway. The housing has a built-in water separator drain petcock and the filter element snaps onto two prongs inside. Budget 15-20 minutes.

1. Crawl under the driver’s side, just behind the front door. You’ll see a metal skid pan protecting the fuel filter housing — three 10mm bolts hold it on.

Off-Road Package note: If your Ram 1500 has the Off-Road Group (skid plates, tow hooks, hill descent control), there’s an additional skid plate below the standard filter skid pan, held on by 16mm bolts. Remove that first — the standard 10mm pan is behind it. Without the off-road package, you go straight to the 10mm pan.

2. Remove the 3 skid pan bolts. These are tiny and rust-prone — if they’re crusty, hit them with penetrating oil first. Set the skid pan aside. Clean the inside of it while it’s off (it collects road grime).
3. You’ll now see the plastic fuel filter housing with a yellow petcock on the front (looks like a radiator drain). Place your drain pan underneath.
4. Drain the housing: Loosen the yellow petcock by hand (it’s plastic — don’t use pliers). Diesel will stream out — about 8-12 ounces. Once it stops dripping, hand-tighten the petcock. Snug only; overtightening cracks the plastic.
5. Using a 1-1/8" or 28mm socket, loosen the plastic filter housing cap. The cap is plastic and the threads are plastic — go slow. Once loose, finish by hand. The cap will still have residual fuel, so angle it into the drain pan as you remove it.
6. Pull the old filter element straight down out of the housing. It’s held in place by two prongs that run perpendicular to the frame rail — the filter has corresponding slots that grip the prongs. It takes a firm tug but no tools.
7. Inspect the bottom of the drained diesel still in your drain pan. If you see metal particles shimmering in the fuel (one owner found them at 15,000 miles), your fuel source has a contamination problem. Switch fueling stations and shorten your filter interval to 10,000-12,000 miles.
8. Wipe out the inside of the housing with a clean, lint-free rag. Pay attention to the bottom where sediment settles. The two prongs inside are the water-in-fuel sensor probes — don’t bend them, don’t spray them with cleaner, don’t touch them with anything metal.
9. Take the new 68436631AA filter out of the box. It comes with one large O-ring for the housing cap. The filter itself has a green O-ring pre-installed at the top neck — do not remove it.
10. Lubricate the new cap O-ring. Dip a clean finger in engine oil or diesel and run a thin film around the O-ring. This prevents it from binding and rolling during installation.
11. Push the new filter element up into the housing. Orient it so the slots align with the two prongs — prongs run perpendicular to the frame rail. Push until it seats with an audible click.
12. Reinstall the cap. This is the step that requires patience. Center the cap carefully in the housing threads, turn by hand until it threads smoothly (if it binds, you’re cross-threading — back off and restart). Once the threads are engaged, tighten with the socket until the cap bottoms on its sealing surface. Do not overtighten — the cap is plastic and the sealing surface is the O-ring, not the threads. When you feel the cap hit the end of the threads, stop.
13. Reinstall the skid pan: 3 bolts with a dab of anti-seize. Torque spec is “snug” — these are tiny bolts threading into clips, not frame steel. Over-tighten and you’re drilling out a snapped bolt.

Page 426 of your owner’s manual has the official fuel filter procedure. The manual says to prime twice. Experienced owners recommend 4-6 cycles — the pump pushes fuel through a dry filter element, and air takes longer to purge than the manual acknowledges.

Step 5: Prime the Fuel System — The Push-Button Method

The Gen 3 EcoDiesel uses an in-tank lift pump and a push-button keyless ignition. The priming procedure is simple but the number of cycles matters.

1. DO NOT put your foot on the brake. If you touch the brake, the engine will try to start.
2. Press the ENGINE START/STOP button once (no brake). The instrument cluster lights up in RUN mode.
3. Listen. The in-tank fuel pump will run for approximately 25-30 seconds — you’ll hear a hum from under the rear seats. On the first cycle, the sound will be gurgling as fuel fills the dry filter housing. On the second, less gurgling. By the fourth, a smooth hum.
4. When the pump stops, press the START/STOP button again to turn OFF. Wait 5 seconds.
5. Repeat the RUN→OFF cycle 4-6 times. The owner’s manual specifies 2 cycles (page 427). Ignore that — a dry cartridge element holds more air than the manual accounts for. If you hear gurgling or bubbling through the fuel return line during any cycle, add 2 more cycles. Stop when the pump runs briefly and shuts off almost immediately (system pressurized, no air left to compress).
6. On the final cycle, put your foot on the brake and start the engine. It should fire immediately. Let it idle for 60 seconds.
7. Crawl under the truck and check the filter housing cap and petcock for leaks. Residual fuel from the job is normal — active dripping is not.

What the pump sound tells you: Gurgling and bubbling = air being pushed through the return line. Smooth, steady hum = housing is full, system is purged, pump is working against fuel pressure instead of compressing air. If the engine cranks but doesn’t start on the first try, turn it off immediately and run 2 more prime cycles. Do not crank for more than 5 seconds — running the HPFP dry is how you turn a $49 filter change into a $3,000 fuel system repair.

Step 6: Final Checks

1. With the engine idling, check:
   • Fuel filter mounting flange: Dry — no diesel weeping
   • Oil filter cap: Dry — no oil seeping from the cap-to-housing joint
   • Oil drain plug: Dry
2. Take the truck for a 5-minute drive. The EcoDiesel’s engine cover insulates sound well — wind noise at 45 MPH can mask a leak you’d hear at idle. Pull over after the drive and visually re-check all three points.
3. Log the date, mileage, and which filters were changed.

Five Common Gen 3 EcoDiesel Filter Mistakes

1. Reusing the old oil filter cap O-rings. The factory O-rings on the 68507598AA cap are designed for one compression cycle. After 10,000 miles of heat cycling, they take a set — they’re flattened and hardened. Reusing them guarantees a slow weep at the cap-to-housing joint that looks exactly like a rear main seal leak. Replace both O-rings every oil change. Or use a pre-assembled cap and never think about O-rings again.

2. Over-torquing the composite oil filter cap. The spec is 18 ft-lbs (25 Nm). A standard 3/8" ratchet can easily deliver 40+ ft-lbs with one hand. Cracked oil filter caps are the #1 EcoDiesel forum failure post — and the replacement cap from Mopar is $45-65. Use a torque wrench. Every time.

3. Using 15W-40 instead of 5W-40. HD diesel owners are conditioned to 15W-40. The EcoDiesel is not an HD engine. 15W-40 in a Gen 3 EcoDiesel causes cold-start VVT lag, increased turbo bearing wear during warmup, and in cold climates, oil starvation at the cam phasers. The oil cap says 5W-40 for a reason.

4. Skipping the cabin filter because “it’s just a cabin filter.” On a gas truck, maybe. On a diesel with an activated carbon cabin filter, skipping it means you’re breathing diesel particulate and sulfur compounds every time the HVAC runs. If your wife or kids notice the truck “smells like a truck,” the cabin filter is the culprit.

5. Not doing the full push-button prime cycle after a fuel filter change. The owner’s manual says 2 RUN cycles. Experienced owners who listen to the fuel pump know that’s not enough — a dry cartridge element holds more air than the manual accounts for, and you can hear gurgling through cycle 3 or 4. Do 4-6 cycles. Listen for the pump sound to change from gurgling (air in the housing) to a smooth hum (housing full, system pressurized). If you start the engine with air still in the filter housing, the first hard acceleration causes a momentary pressure drop at the HPFP inlet. That drop causes cavitation. Cavitation causes micro-pitting. Micro-pitting accumulates over 20,000 miles. This is how fuel filters kill HPFPs — not in one dramatic failure, but in a thousand micro-injuries you never feel.

6. Cross-threading the plastic fuel filter cap. The cap on the filter housing is plastic threading into plastic. If you start the cap at an angle and force it with the ratchet, you’ll chew the first thread — and the housing is part of the fuel system assembly, not a $15 replacement part. Hand-thread the cap until it spins freely, center it carefully, and only use the socket for final snugging. If it binds, back it off and restart. The seal comes from the O-ring, not from cranking the cap down like a lug nut.

FAQ

Q1: Does this kit fit my 2018 Ram 1500 EcoDiesel? A: No. This kit is for the Gen 3 EcoDiesel (2020-2023). The 2014-2019 Gen 2 EcoDiesel uses a spin-on oil filter (different part number), a different fuel filter housing location, and different air/cabin filter part numbers. If you have a 2014-2019, TruckTok sells a Gen 2-specific kit.

Q2: What’s the difference between 68436631AA and 68498720AA oil filters? A: 68507598AA is the current Mopar part number for the Gen 3 EcoDiesel oil filter (cartridge-in-cap). 68498720AA is an earlier revision of the same filter. They’re interchangeable for 2020-2023. The 68507598AA supersedes 68498720AA and has a revised O-ring compound with better heat resistance.

Q3: How often should I actually change the fuel filter? A: Mopar says 20,000 miles. If you tow heavy (6,000+ lbs regularly) or buy fuel from high-turnover stations (truck stops, not rural gas stations), you can stretch to 30,000. If you fuel up at marinas, farm tanks, or anywhere with questionable diesel turnover, change it every 15,000. The WIF sensor is your early warning — if you’re draining water from the sensor at every oil change, your fuel source is the problem, not the filter interval.

Q4: Can I use Rotella T6 5W-40 instead of Mopar-branded oil? A: Yes. Shell Rotella T6 5W-40 (API CK-4) is the most commonly used aftermarket oil in the Gen 3 EcoDiesel and it meets or exceeds the Mopar MS-10902 spec. Valvoline Premium Blue 5W-40 and Mobil 1 Turbo Diesel Truck 5W-40 are also widely used. Do NOT use Rotella T4 15W-40 — wrong viscosity.

Q5: Does the Gen 3 EcoDiesel have a CP4.2 failure problem like the LML Duramax? A: Not to the same degree. The EcoDiesel’s HPFP is a CP4.2-derivative but with a smaller displacement (lower stroke volume = lower internal loading), and the VM Motori platform uses different metallurgy on the cam follower rollers. Documented CP4 failures on Gen 3 EcoDiesels are rare compared to LML Duramax or 2011-2012 6.7L Powerstroke. That said, fuel filtration is still critical — a collapsed filter media sending cellulose fibers into the HPFP will destroy it regardless of the pump design.

Q6: Why does the cabin filter have an activated carbon layer on a diesel truck? A: Activated carbon adsorbs gaseous pollutants — specifically the sulfur dioxide, nitrogen oxides, and volatile organic compounds in diesel exhaust that pass through a standard paper filter. If you drive in traffic, idle at job sites, or remote-start your truck in an enclosed area, the activated carbon layer prevents those compounds from accumulating in the cabin air. It’s the difference between “smells like a diesel” and “smells like nothing.”

Q7: My truck has a “Water In Fuel” warning. Do I need to drain the filter or replace it? A: The “Water In Fuel” message means the two metal probe prongs inside the filter housing have detected water accumulation at the bottom of the housing (water is more conductive than diesel, so the sensor measures resistance between the probes). To drain: remove the skid pan, place a container under the yellow petcock, loosen it by hand, and drain until pure diesel appears — usually 2-4 ounces of water first, then clean fuel. Re-tighten the petcock (snug only, it’s plastic). But if the filter has more than 10,000 miles on it, just replace it — water that’s been sitting against the filter media degrades the water-separating coating and the element itself.

Q8: Can I install all four filters without a lift or jack? A: Yes — the Ram 1500 has 8-10 inches of ground clearance at stock height. The fuel filter is reachable from the ground on the driver’s side frame rail. The oil drain plug is accessible from the front. No wheel removal, no jack stands needed. This is a genuine driveway job.

Q9: How do I reset the “Change Fuel Filter” message? A: The Gen 3 EcoDiesel doesn’t have a dedicated fuel filter life monitor. The system relies on the Oil Life Monitor and your odometer. Write the mileage on the filter with a Sharpie when you install it. If you’re seeing a fuel-related warning on the DIC, it’s either the WIF sensor or a P0087/P0088 fuel pressure code — not a maintenance reminder.

Q10: Is the pre-assembled oil cap really necessary, or is it a gimmick? A: It’s necessary if you value your time and your driveway. Dealer techs replace the cap every 2-3 oil changes because the composite degrades. DIY owners who reuse the cap indefinitely eventually crack it or pinch an O-ring. The $20-30 premium for a new cap with pre-installed O-rings is less than the cost of diagnosing a “mystery oil leak” that turns out to be a pinched center-tube O-ring.

Q11: What’s the MPG impact of a clogged air filter on the EcoDiesel? A: A restricted air filter enriches the air-fuel ratio, forcing the turbo to work harder to overcome intake restriction. The EcoDiesel’s ECU compensates by increasing boost pressure, which increases exhaust backpressure, which increases pumping losses. Real-world impact: 1-3 MPG drop on the highway. Over a 30,000-mile interval, that’s $200-400 in wasted diesel — more than the cost of the filter itself.

Q12: Can I mix and match filter brands? A: You can, but the oil filter is the one where you shouldn’t. The 68507598AA cap and cartridge are an integrated system — the bypass valve spring rate, drain-back valve, and O-ring groove dimensions are designed for Mopar-spec components. A Wix or Purolator cartridge in a Mopar cap should work, but the center-tube O-ring tolerance is tight enough that even a 0.5mm difference in cartridge height can cause a leak. The safest approach: use a complete cap-and-cartridge assembly.

Q13: My 2022 has a different looking airbox than my buddy’s 2020. Same filter? A: Yes. The Gen 3 EcoDiesel airbox underwent a minor revision in 2022 (the intake snorkel routing changed slightly for NVH reasons), but the filter element — 68441763AA — is identical across all 2020-2023 model years. The housing lid and screws are the same.

Q14: What’s the single most important filter on this engine? A: The fuel filter. The EcoDiesel’s 36,000 PSI fuel system is the highest-pressure system in any light-duty diesel. The injectors have nozzle orifices measured in single-digit microns. The HPFP plungers rely on diesel’s boundary-layer lubrication. A single tank of water-contaminated fuel, a single collapsed filter media, a single injector scored by a 10-micron particle that should have been trapped at 5 microns — any of these events costs more than a lifetime supply of 68436631AA filters. Change it on time, use a quality filter, and prime the system properly after every change.

Individual Filter Product Pages

• Fuel Filter — Replaces 68436631AA / PF46152
• Oil Filter — Replaces 68507598AA / 68498720AA
• Engine Air Filter — Replaces 68441763AA / DPA3462
• Cabin Air Filter — Replaces 68406048AA / CF11671

Shop the Complete 4-Filter EcoDiesel Kit →

$113.40 — all four filters, one box, free shipping. Pre-assembled oil cap, activated carbon cabin filter, chassis-mounted fuel/water separator.

Disclaimer: This guide is for informational purposes only. Always consult your vehicle’s owner’s manual and follow manufacturer specifications. Diesel fuel is flammable and carcinogenic — wear appropriate PPE and work in a well-ventilated area. If you’re not comfortable performing filter changes yourself, consult a qualified diesel mechanic. TruckTok is not liable for damage resulting from improper installation. Product pricing and competitor data are estimates based on marketplace research as of July 2026.