What different oil weights and viscosities really mean and how they effect your engine.
Mobil 1 Racing oils are formulated for on-track used only and are not recommended for street use. These race-proven synthetic motor oils are specifically designed to maximize horsepower in a wide range of race engine applications.
Signature Series 5W-30 Synthetic Motor Oil was tested against other oils to determine which provides the greatest level of protection against deposit formation in high-heat applications. The TEOST (Thermo-Oxidation Engine Oil Simulation Test) 33C test (ASTM D6335) is an industry-standard bench test that simulates turbocharger operating conditions.