Fuel Saving Tips

How fast should you drive for fuel economy?

The tips I've read so far fail to account for the vehicle's gearing. One guy says drive 55, another says 80, but neither understands that various vehicles are geared differently. Generally, you want to be in high gear, with the engine turning between 2000 and 3000 RPM. You must experiment with every vehicle - don't ASSume that any given speed is "efficient" until you test it!!