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Maybe pulse and engine off coast alot? Atleast you have a big enough truck that you don't have to worry about annoyed people behind you! I'm sure most cars disappear if they tailgate!
I'd imagine your truck uses alot of gas even idling so if you can shut it off for 20% of your commute you would probably save 20% on gas. Braking and steering would have to be tested though with a truck this big.
Get a scanguage if your truck is OBDII compliant,(it works with my 95 neon) as any savings in gas would quickly pay it off. You will be able to see that even coasting with the engine idling saves quite abit of gas. Even with my little cars idling while coasting uses about 1/3 to 1/4 as much gas as maintaining rpm in gear.
As for getting 25mpg, I have to try to get 27mpg with 2.0L and 4 wheel drive (no aero mods yet) so it may not happen, but with a few driving mods you will be able to save quite abit of cash.
Ian
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