OEMs have advanced engines design 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 Synthetic Blend Heavy Duty 15W-40 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.
  

Performance You'll Notice

Sinclair Synthetic Blend 15W-40 CK-4 delivers, with outstanding protection and performance. It controls friction and reduces metal-to-metal contact in today’s engine designs as well as older engine models.

Three Keys to Better Performance.

Sinclair Synthetic Blend 15W-40 CK-4 gives you:

Applications

Product and grade is diesel 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 backward 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.