Fleetguard Oil Filters for Cummins Engines: Full Specs & Guide

Fleetguard oil filters are widely considered the top choice for Cummins engines. That makes sense since Fleetguard was owned by Cummins (now under a separate company called Atmus Filtration Technologies), so they are made after factory specs.

If you want to maximize protection, you should also select the best oil for 6.7 Cummins to pair with these high-quality filters.

Fleetguard uses a patented multi-layer synthetic material called StrataPore. It catches more contaminants than standard filter media while keeping oil flowing freely. Users and mechanics report less internal engine wear over time, and some applications support service intervals up to 500 hours or 20,000 miles.

Best-selling Fleetguard Oil Filters

These are some of the most popular Fleetguard oil filters. 

Fleetguard LF16035 

Fleetguard LF16035 is the premium spin-on oil filter for Cummins diesel engines. It’s an upgrade over the standard LF3972, using StrataPore synthetic media instead of regular cellulose.

Quick Specs

• Filter Media: StrataPore™ multi-layer synthetic
• Filtration Efficiency: 100% at 30 microns / 60% at 10 microns
• Flow Rate: 8.72 GPM (33.00 L/min)
• Max Working Pressure: 125 PSI
• Burst Pressure: 203 PSI
• Height: 6.94 in (176.28 mm)
• Outer Diameter: 3.68 in (93.47 mm)
• Thread Size: 1-16 UN-2B
• Gasket OD: 2.83 in (71.88 mm)

Compatible Vehicles for LF16035

• Ram 2500, 3500, 4500, 5500 (also older D250, D350, W250, W350)
• Cummins 5.9L and 6.7L Turbo Diesel from 1989 through 2024
• Supports 500-hour or extended oil change intervals

User Reviews

Online, the LF16035 has near-perfect reviews. Fleet mechanics trust it consistently. The StrataPore media gets called out specifically for cold-start protection, when oil pressure drops and flow restriction matters most.

Fleetguard LF3970 

LF3970 is a full-flow, spin-on oil filter for heavy-duty Cummins engines. It uses the same StrataPore synthetic media as the LF16035. The most noticeable difference between the two is the exterior: the LF3970 has a smooth can, while the LF16035 has a ridged (knurled) body for easier hand removal.

Quick Specs

• Filter Media: StrataPore™ multi-layer synthetic
• Filtration Efficiency: ~99–100% at 30 microns / 60% at 10 microns
• Flow Rate: 8.72 GPM (33.00 L/min)
• Max Working Pressure: 125 PSI
• Bypass Valve Setting: 0 PSI
• Height: 6.96 in (176.78 mm)
• Outer Diameter: 3.68 in (93.47 mm)
• Thread Size: 1-1/8-16 UN-2B
• Gasket OD: 2.83 in (71.88 mm)

Compatible Vehicles for LF16035

• Cummins engines: ISB, QSB, and B-series: 3.9L, 4.5L, 5.9L, and 6.7L
• Motorhomes: Cummins ISB 5.9L (1998–2006) and ISB/B 6.7L (2007–2021+)
• Equipment: Medium-duty trucks, construction equipment, agricultural machinery, industrial applications

What users say

The LF16035 is consistently rated 5/5 at diesel parts retailers. Users credit it with long engine life and reliable contaminant protection. Easy to install. One long-term owner directly credited consistent use of Fleetguard parts for their truck’s longevity.

Heads up: This filter has hit backorder before. If you need it, don’t wait until your change is due. Best to check Amazon since you’re likely to find it there.

Fleetguard LF9009 

Fleetguard LF9009 is marketed as a Venturi™ Combo filter, meaning it handles both full-flow and bypass filtration in one unit. Most filters only do one or the other. Full-flow filters all the oil before it reaches the engine; bypass filters a smaller portion at a time, catching finer particles. Combining both in one filter means better overall cleanliness without needing a second filter housing.

Quick Specs

• Filter Media: StrataPore™ synthetic, gradient density

• Filtration Efficiency: 98.7% TWA at 30 microns

• Height: 11.88 in (301.76 mm)

• Outer Diameter: 4.658 in (118.31 mm)

• Gasket OD: 4.68 in (118.87 mm)

• Gasket ID: 4.01 in (101.85 mm)

• Thread Size: 2-1/4-12 UNS-2B

• Design: Full-flow + stacked disc, no standpipe

The LF9009 is a noticeably larger filter than the LF3970 or LF16035 as it is built for bigger, higher-output engines. Its change interval is at 20,000 miles, 500 hours, or 6 months, whichever comes first.

Compatible Vehicles for LF9009

• Cummins ISC 8.3L and ISL 9.0L
• Cummins ISM and M11
• Cummins N14 (Command Series and Plus)
• Cummins QSL 9.0L, QSC, and NTA 855
• Direct replacement for any application previously using the LF3000
• Compatible with select John Deere (AT193242) and Sisu (1216400561) equipment

What users say

Rated 5/5. Fleet mechanics at large operations trust it consistently. Users report cleaner oil and smoother engine operation over time. Long service life is a recurring theme.

Fleetguard LF14009NN 

Fleetguard LF14009NN is the next step up from the LF9009. Same Venturi™ Combo design (full-flow + bypass in one unit), same physical fitment but with NanoNet® media instead of StrataPore. The “NN” in the part number always means NanoNet.

To see how this technology compares, you can evaluate the Fleetguard LF14000NN, which also utilizes NanoNet for superior debris retention.

Quick Specs

• Filter Media: NanoNet® proprietary synthetic
• Filter Type: Venturi™ Combo, full-flow + bypass in one unit
• Fitment: Same as LF9009
• Best For: 2010+ heavy-duty Cummins engines

What engines does it fit?

Replaces the LF9009 and LF3000 in all compatible applications:

• Cummins ISC 8.3L and ISL 9.0L
• Cummins ISM and M11
• Cummins N14 (Command Series and Plus)
• Cummins QSL 9.0L, QSC, and NTA 855

What users say

The diesel community calls it the gold standard for these engines. One user summed it up plainly: “an even better filter than the LF9009,” which was already well-regarded. Forum users on iRV2 noted it can offer better filtration at a lower price if you shop around.

Fleetguard LF3894

Fleetguard LF3894 is a full-flow spin-on oil filter using StrataPore™ synthetic media. Think of it as the smooth-can counterpart to the LF16035: same media, different exterior.

What engines and trucks does it fit?

• Cummins 5.9L and 6.7L Turbo Diesel: 1989 through 2024
• Ram 2500, 3500, 4500, 5500

The LF3894 is the upgrade over the LF3972 and the smooth-can version of the LF16035. If you want StrataPore media but your housing works better with a smooth can, this is your filter.

Alternative Brands to Fleetguard Oil Filters

Fleetguard is the OE standard for Cummins, but these brands are all legitimate substitutes for lube filters.

Baldwin

The most direct competitor in the heavy-duty space. Some Baldwin specs meet or exceed Fleetguard’s OE specs on specific parts. It is widely available at truck parts retailers.

Wix / NAPA Gold

Wix is the go-to when Fleetguard is on backorder. It is consistently available at local auto parts stores. NAPA Gold is made by Wix on the same lines. They’re the same filter in different packaging. Fleetguard StrataPore is generally rated equal to or slightly better than Wix XP and NAPA Platinum.

Donaldson

This brand offers exact-match replacements exist for the most common Fleetguard lube filters.

Mopar

For Ram truck owners: in most Cummins applications, Mopar filters are Fleetguard filters. They are likely to be the same factory, same construction, just rebranded. Both the Fleetguard and Cummins logos are often embossed directly on the shell.

Closing Notes

Stick with the factory-recommended brand when you can. For Cummins engines, that means Fleetguard or Mopar. If Fleetguard is on backorder, Baldwin, Wix/NAPA Gold, and Donaldson are all solid substitutes that won’t compromise your engine.

Just be aware that fake Fleetguard and Mopar do exist. Keep your eyes sharp. Incorrect label printing is one warning sign, but the safest move is to buy from a reputable source. If the price looks unusually low or the packaging looks off, trust that instinct.

You can also find these filters on Amazon, just be sure to check out the reviews and specs. Avoid third-party listings with limited reviews or suspiciously low prices. 

Finally, always ensure you read your car’s oil dipstick correctly after every service to confirm the job was done right.