Originally Posted by Whaazup17
Also I read that every 100 lbs is like 10% more fuel economy.
Shouldn't consider fixed weights vs percentage fuel economy.
100% increase on 15mpg car would be 30mpg.
100% increase on 30mpg car would be 60mpg.
100% increase on 60mpg car would be 120mpg.
You could do this with a 3,800 lb car, make it into a 800 lb car, and get 120 mpg? No.
Somewhere, it breaks down, because gas mileage isn't entirely dependent on the car's weight. ESPECIALLY not highway mileage.