Patent ID: 8071518

Claim:
A low ash engine oil composition with a sulfated ash content of 0.6 percent by mass or less, consisting essentially of: a lubricating base oil with a % C A of 2 or less, a kinematic viscosity at 40Â° C. of 25 mm 2 /s or less and a viscosity index of 120 or greater; a viscosity index improver contained in such an amount that the viscosity index of the composition will be 160 or greater; a metallic detergent with a metal ratio of 3 or less selected from an alkaline earth metal sulfonate and an alkaline earth metal phenate; a metallic detergent with a metal ratio of greater than 3 selected from an alkaline earth metal sulfonate and an alkaline earth metal phenate; a sulfur-free phosphorus compound; and at least one additive selected from the group consisting of an ashless antioxidant, a friction modifier, an ashless dispersant, an antiwear agent, an extreme pressure additive, a corrosion inhibitor, a rust inhibitor, a demulsifier, a metal deactivator, an antifoaming agent, and a colorant.