Re: Mileage on diesels - BullyDogs - Redline 85 Plus
I have pretty much the exact same van although mine is 4x4. I can probably get 17 with a tail wind at 55mph, but usually it is below 15 with "good gas pedal management" meaning an average of 60mph, easing up hills, etc. My pre-fuel crisis driving style, 75+ with the AC running got me a real consistent 11.6x.
I haven't measured it in a long time, and the fuel filling problems make it difficult to gauge accurately, but I'd say "nothing better than 11 without a bullydog" is total BS.
Incidentially I think getting 20 over more than a small stretch is also total BS.