AMERIGUARD® Full Synthetic 5W-40 CK-4 Heavy Duty Diesel Engine Oil uses the latest technology to provide our best protection and deliver dependability, unsurpassed engine protection, performance, and cleanliness. 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 motor oil is formulated to provide the following features and benefits:

• Our best cold temperature performance.
• Superior extended drain capability.
• Superior fuel economy. Reduces fuel costs without sacrificing engine protection and performance.
• Unsurpassed wear protection. This latest generation engine oil provides increased protection against harmful engine and bearing wear due to cavitation and aeration. 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
• Formulated with higher starting TBN (10). Provides added oxidation control and protection against acid buildup that can cause rust and corrosion.
• 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.