Quote:
Originally Posted by oil pan 4
The new ones were supposed to get around 8 mpg then dpf hit big trucks.
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I've understood the DPF doesn't have a huge effect on fuel consumption on most big rigs unless not maintained properly. The thing is that if used for long distance driving it incinerates it's contents without the need for active afterburning. But for short routes, yes, it needs to regenerate by adding fuel.
Tip for all you newer diesel owners. Wrap up your exhausts with heat tape. Diesels don't have as high exhaust temps as a gasoline engine does so wrapping exhaust post turbo won't hurt anything while also keeping catalytic converters and DPF's hotter so you end up needing less fuel to regen and you also keep things less clogged with suet.