# Gas Mileage Questions **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [August 11, 2006, 1:28pm UTC](https://forums.speedlife.net/t/gas-mileage-questions/15836 "2006-08-11T13:28:15Z")\ **Posts on this page:** 1\ **Showing post:** 29
**Author:** ![Tkklemann](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tkklemann/32/7298_2.png) [@Tkklemann](https://forums.speedlife.net/u/Tkklemann)\ **Post date:** [October 25, 2006, 12:11pm UTC](https://forums.speedlife.net/t/gas-mileage-questions/15836/29 "2006-10-25T12:11:52Z")
> [@BikerFry](#): > > The difference is that in gear your engine will be spinning proportional to road speed, say 3000 rpm for example so your engine will burn gas at 3000 rpm/closed throttle. Not True. When you are at 3000rpm and in gear with the throttle closed, you engine is pumping only air through it, thus engine braking, which is why if you are coasting with closed throttle, you are slowing down. Your engine does not burn gas at any rpm with the throttle closed, with the exception of idle. Unless (There always is an unless) you have a pesky EVO like I do, which if you are above a certain RPM, not sure where the cutoff is, and you close the throttle, it will burn a small amount of gas so that you don’t get bucked by letting off the gas suddenly. I know that if I am in say, 3rd gear, about 6,500rpm’s and you suddenly close the throttle, it will come down gently because the car is burning gas to keep it from reving down fast. At a certain RPM, it will shut the gas off, and you will see the car start to slow even more than before. I think the window is somewhere between about 4,000 and redline… --- _[View the full topic](https://forums.speedlife.net/t/gas-mileage-questions/15836)._