Fuel Saving Tips
Petrol (USA gas) engines are most efficient at 2,000 rpm. Don't drive at lower engine speeds if you can help it, unless going downhill. I have read that Diesel engines are more efficient at lower engine speeds, but I cannot confirm this. A rolling road test would determine the most efficient engine speed for your particular vehicle and I would be interested to hear from anyone who has figures.
posted by Forester1998 on April 26, 2015
this tip works for 5% of voting Fuelly members.