Lube Advisor

Heavy Duty Engine Oil

Sinclair heavy duty engine oils give you the protection today’s heavy-duty engines demand.

Advanced Protection For Advanced Engine Designs

The technology of today allows manufacturers to produce engines that are especially demanding. Increased horsepower, engine temps, lower emissions and improved fuel economy require the most advanced engine oils to operate at peak efficiency.

You Need Performance You'll Notice

Sinclair understands those challenges, and the technology behind Sinclair heavy duty engine oils more than fits the bill. They balance durability, protect emissions controls, and extend drain intervals to deliver mile after mile.