For one, 100% fully synthetic oils can last up to 11 times longer than conventional oil depending on the vehicle, application and fuel type. A small company called Amsoil is the only company that has such long lasting motor oils. The Amsoil corporation is the very first company in the United States to make synthetic motor oil for passenger cars, years before Mobil 1, Havoline, Valvoline, Castrol or any of the other big-named companies. Amsoil owns the trademark for the phrase “First in Synthetics” because of this. The thing is that most people don’t know is that Amsoil is the only company that makes motor oil last up to an incredible 1-year or 35,000 miles and has been doing this since 1972. This oil is guaranteed in writing.
Company Resource: Ground Source Heat Pump, Industrial Air Conditioner, Air Source Heat Pump,
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