Well another part to my point is that fleets are unlikely to put v 8 engines in their trucks either . Most of the f 150 sales at the Ford dealer I worked at were for fleet because we were close to the oil patch . They either got the smallest and most fuel efficient engines if they weren ' t towing any weight and diesel engines if they were . I think v 8 ' s are becoming less and less common if you go back to the height of their popularity in the muscle car era to now you ' d likely see a steady decline . I know some people are going to point out that some diesels are v 8 ' s but gas and diesel are two different worlds and the original conversation was about HEMI engines and performance gasoline . The best diesel you could out in a pick up truck right now is the cummins 6 . 7 L which is an inline 6 .