Yeah, less of an issue with gassers. The primary reason for diesels to use them is soot loading. With the advent of EGR on diesels, soot is a real problem. A bypass or spinner unit can really clean that out of oil. Actual wear particles and such are not really a major problem even with the bigger diesels as for needing a bypass. This is why I have never considered it for my gas pickup, just a good quality synthetic media full flow. But every heavy diesel I have owned has gotten a bypass unit put on at the first oil change. The Powerstokes, Dmax's, Cummins engines in pickups could definitely benefit from a bypass also. Again, the soot loading of the oil.