Better Fuel Economy

It's the old "Tortoise and Hare" story: Steady wins the economy race, too. If you use cruise control on the highway, you've no doubt observed many people do not. That's because you see them speed past you one minute, and then you must pass them a few minutes later. Maintaining a constant speed is pleasing to your engine. One exception: Don't use cruise control on wet roads, where it increases the risk of accidents.