AMERIGUARD® Synthetic Blend 10W-30 CK-4 Heavy Duty Diesel Engine Oil uses the latest technology that provides extra protection, compared to Conventional Oil. It’s formulated with a combination of full synthetic and high-quality Group II base oils. You and your vehicles work hard for the important things in life. Trust high-quality AMERIGUARD® Lubricants by Sapp Bros. to protect engines and your investment -- at an excellent value. Our engine oil is formulated to provide the following features and benefits:

• Improved cold temperature performance, extra protection, and some improved fuel economy, compared to Conventional 15W-40 CK-4 grade.
• Extended drain capability.
• Extra wear protection. Our technology delivers up to 53% better wear protection.¹
• Better oxidation and deposit control. It stands up to high heat and stress to protect as well on the last day as it does on the first day. Up to 83% better oxidation control and 63% better deposit control.²
• Meets or exceeds the requirements of OEMs.

Applications

• This product and grade is a fuel economy and mixed fleet 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.