Yup , and depends on how much Bio-Fuel they are pumping into your diesels fuel in your area . NOT supposed to go over 20% .
but they always do . R
So 20% bio fuel makes MPG go down 25% ??? Something don't add up there especially since some guys run 100% bio fuel and don't get significantly different MPG...
It doesn’t, biodiesel doesn’t provide a significant fuel economy shift (it isn’t like ethanol in a gas engine). Something is wrong with the original poster’s truck, I’m guessing it has an injector on its way out.
