Diesel engine oil brands

Castrol’s portfolio of high-quality diesel engine oils offers choices to help keep your fleet on the road.

Castrol’s diesel engine oils are formulated with excellent base oils and high-quality additives. This combination delivers outstanding performance in three key areas that affect engine oil performance: alkalinity reserve, shear stability, and oxidation stability.

• Alkalinity reserve is the oil’s ability to neutralize acids that are formed in the crankcase during diesel combustion 
• Shear stability maintains oil film thickness, which helps to extend engine life by protecting critical moving parts like rings, bearings, and other engine components
• Oxidation stability minimizes oil degradation, thickening, and deposits and helps enable extended-drain performance