Super Six fuel mileage

The fastest i drive this car on the hwy is 50. i was running 195-70-14's when i got the improvment of fuel mileage which is when i got the 30 i was also letting the car practically pull itself. I unfortunatly had to get rid of those tires since they were dry rotted. i have 215-75-14's on the back now and the car hates it. I forget what they call this new "green" style of driving, but you put the car in N when slowing for a stop sign or light. You also begin decelleration a much longer distance back having to use your brakes sparringly : ) (makes them last longer too). I like to practice these little methods being that gas is so high and the car is quite old. i try to do everything i can to improve fuel mileage. Now if these practices would just work with my 1/2 ton.... the thirsty turd

Chucky can I ask a question and one suggestion? What trans do you have?
and join Slant6.org lots of great information on there, but do a search and read before posting. Now if you want to get 30 and better,join there.

If you have a 904 is a good trans but a OD will give you better gas mileage or change to a 4 speed A833 OD see what gear you have in the rear and get taller tires(height) once all that is done take it to get your speedo calibrated.

Then keep a log of how much gas you put in and the mileage that will tell you more than anything to improve mileage driving does help but you can get the same results driving 55-65 without getting run over.