Mobil 1 Racing 4T 10W-40 is recommended for four-cycle motorcycles which specify the use of a 10W-40 engine oil. It provides excellent performance in motorcycle engines that are designed with a common engine/transmission lubrication system or where the engine lubrication system is separate from the transmission system. In the case of the latter, follow the manufacturer's recommendation for the type of fluid to be used in the transmission. Mobil 1 Racing 4T 10W-40 engine oil is also designed to provide the proper frictional characteristics necessary for wet-clutch engine/transmission systems.

Mobil 1 Racing 4T 10W-40 is also an excellent choice of lubricant similar in viscosity to Porsche's recommended for aircooled Porsche engines where catalytic converter longevity is not a consideration. Please note that use of this product in an engine with a catalytic converter or particulate emissions filter may result in damage to these expensive emissions control devices.

Mobil 1 Racing 4T 10W-40 exceeds the requirements of API Service Categories SH, SG/CF, CD, JASO MA and has been fully tested, both on laboratory dynamometers and in the field, to provide optimum horsepower and acceleration.

Fully synthetic Mobil 1 motorcycle oils are specifically engineered for use in motorcycles. The formulations are based on the proven technology used in other Mobil 1 automotive products, yet they are optimized for the unique requirements of a motorcycle engine and/or transmission. You can use them with confidence, knowing they will protect your bike in extreme situations where conventional motor oils simply cannot compare, including extended high-speed operation and prolonged idling in summertime traffic.

Mobil 1 Racing 4T 10W-40 was previously known as Mobil 1 MX4T 10W-40.