Quote Originally Posted by kitz
Oh yeah I've heard of it but the numbers have not been reliable and what I have seen (like above) are just not significant. What you need to do is change everything over, get some good mileage numbers, and then do a complete cost analysis based on all your results. Then get back with us on all the results.

kitz, (head master of the 'do as I say, not as I do' club for men)
well thats why i'm doing it to test it like i said it'll be this one time and one time only unless you really do save then i will stick with but i'll post the overall cost but i want to see if i can get above 20 mpg with my jimmy
i don't know how big the tank is i think 15 gal. but every 200 miles you have to fill it up