Fuel Saving Tips

Best MPG for petrol (USA gas) is at 2,000 rpm.

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.