Does your vehicle have an engine-driven fan? Many trucks, vans and SUVs have a heavy metal cooling fan that is run off the engine crankshaft by a belt. These fans are heavy and have a lot of inertia. It takes a lot of rotational kinetic energy to get them going which is just lost when they slow down. That translates to more gallons spent per hundred miles of driving. Think about replacing it with a much lighter, plastic electric driven fan. The weight savings will give a fuel savings. And many modern electric fans are designed to be more efficient than engine driven ones because they have a computer which can control their speed independently of the engine speed. You will get a fuel economy boost and a litle extra horsepower too!
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