Withstanding high engine temperature is one of the most vital tasks a motor oil must accomplish.  Mobil 1 resists high temperature oxidation and prevents oil thickening, which over a prolonged period can cause engine performance to decrease.

That is why it is important to have an engine oil that can handle elevated operational temperatures. Mobil 1 is tested at extreme temperatures to ensure outstanding performance.  By preventing deposit formation, Mobil 1 helps an engine to maximize its expected life while keeping it properly protected at extreme temperatures.