AT netural downhill

roy'sz · 03-18-2012, 07:05 PM

coasing downhill in gear does not save you gas because your rpms will be higher in gear rather than idle, if it weren't then that is one tall gear that you have. True that distance+time will decifer what you would save in fuel. If you know your rpm/gear ratio then you could match it fine, or leav it in sport mode and downshift. Obiviously that all pretty much applies to a manual. As for a automatic, if you are coasint in neutral and the car is running, you are providing transmission fluid cirulation. Not a good idea to coast though in neutral because when you put it back into drive the car has to find what gear you are in and it will most of the time start from 1st all the way to 7.

03-18-2012, 07:05 PM	#12 (permalink)
roy'sz A True Z Fanatic Join Date: Aug 2011 Location: palmdale, ca Posts: 1,299 Drives: 2010 nissan 370z Rep Power: 17	coasing downhill in gear does not save you gas because your rpms will be higher in gear rather than idle, if it weren't then that is one tall gear that you have. True that distance+time will decifer what you would save in fuel. If you know your rpm/gear ratio then you could match it fine, or leav it in sport mode and downshift. Obiviously that all pretty much applies to a manual. As for a automatic, if you are coasint in neutral and the car is running, you are providing transmission fluid cirulation. Not a good idea to coast though in neutral because when you put it back into drive the car has to find what gear you are in and it will most of the time start from 1st all the way to 7.