Excellent friction management for extra protection in light viscosities.

OEMs have advanced engine designs to improve fuel economy, reduce emissions and extend oil drain intervals. And Sinclair has innovated and improved engine oil technology to stay in front of these changes.

Sinclair Full Synthetic Heavy Duty 10W-30 CK-4 Diesel Engine Oil gives you unsurpassed protection and better performance, especially in very cold or hot temperatures.

• Improved fuel economy.
• Outstanding extended drain capability.
• An advanced lubricant that meets or exceeds OEM requirements.

Built for Increased Protection

Sinclair Synthetic Blend 10W-30 gives you unsurpassed performance and powerful, long lasting, high-performing protection that helps control friction while reducing metal-to-metal contact in today’s engines, as well as older models.

Sinclair Synthetic Blend Heavy Duty Diesel Engine Oil: Performance You'll Notice

With Sinclair Synthetic Blend 10W-30, you’ll be getting the benefits of over a century of lubrication know-how, plus:

Applications

This product and grade for fuel economy, cold temperature starts when engine oil recommended for naturally aspirated and turbocharged four-stroke diesel engines in which the API CK-4 service categories are recommended. It is formulated for engines operating under severe service and a wide range of cold and hot temperatures.

• It is backwards compatible for CJ-4 and older API service categories.
• Approved by or meets requirements of major OEMs such as Cummins, Detroit Diesel, Mack/Volvo, Paccar, Navistar, Caterpillar, and others.