Are WIX WF10255NP Fuel Filters Suitable For RAM 6.7L Engines?

A reader asks: I’ve got a 2018 RAM 3500 with the 6.7L Cummins diesel engine. Your application guide shows that the WIX WF10255NP fuel filter is suitable for my engine. However, the bottom of the WIX part looks completely different from the stock Mopar fuel filter (part # 68157291AA). The Mopar filter has an oval opening and the WIX filter has a round opening. Can you confirm that the WIX fuel filter is correct my engine?

Our Answer: The WIX WF10255NP fuel filter is compatible with RAM 6.7L Cummins engines from model year 2013 to present (this article was published in 2024). Confirm your model using our application guide.

The reader sent us photos so that we can compare the WIX WF10255NP and the original equipment Mopar 68157291AA fuel filter.

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The round WIX opening versus the oval Mopar opening on these fuel filters is a non-issue. This feature makes no difference in the installation, compatibility or functionality.

Also, you may note that the Mopar filter has two separate elements (an inner and outer), whereas the WIX filter has one thick element. WIX technical staff tell us that the outer element on the Mopar filter is there strictly to gather moisture. The inner element handles the fuel filtration. WIX employs one thick synthetic media handle both moisture capture and fuel filtration.

Despite the different approach, WIX does not give away protective capabilities using a single element. The WIX WF10255NP fuel filter has a nominal micron rating of 2. The Mopar 68157291AA outer element has a micron rating of 5, while the inner element stops particles down to 3 microns.