4 Seasons Oils

Vacaville, CA

100% Veteran Owned Business

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MOTOR OIL

AMSOIL Signature Synthetic Lubricants Excel in Summer Heat

Extreme summer heat can cause motor oil to break faster and lose viscosity. Amsoil was tested by  an independent laboratory and ran at 304 degrees F for 90 minutes. Afterwards the oil was put back into the engine and the test run again. After running the test a second time the Signature Amsoil still maintained

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