[aerohead]

I looked back over my materials,going back into the 1970s,and couldn't get a "straight answer" about weight reduction.In 1975,a 10% reduction would net about 3.7% average,the range was 4.8-6.48%. A 1973 intermediate car(3500-lbs) would see 0.4mpg hwy/0.5mpg city.In 1965 the SAE allowed 1/4mpg per 100-lbs weight loss.------------------------------- In 1991,100-lbs is supposed to yield 1mpg.----------------------- 1993 100-lbs nets 0.5mpg. Another source says lose 125 pounds,and pick up 0.5mpg.----------------------------- CAR and DRIVER compared the Mercedes 300E to the 300SEL and said the 470-lb weight difference( 12.41%) was good for 15% better fuel economy.---------------------------- Try and make sense out of all that!------------------------- I think if you drop 10%,you'll see it at the pump,especially in the city.Out on the open road I don't know.My CRX at 3,300-lbs only lost 2mpg compared to 1876-lbs.Good luck.