Patent ID: 7786060

Claim:
A lubricating oil additive concentrate comprising an oil of lubricating viscosity, from about 3 to about 45 mass % of an overbased metal detergent, from about 2 mass % to about 20 mass % of an oil-soluble hydrocarbyl phenol aldehyde condensate of the formula wherein n is 0 to 10; Y is a hydrocarbyl group having from 1 to 4 carbon atoms; and R is a hydrocarbyl group having from 4 to 30 carbon atoms, and at least 3 mass %, based on the total mass of said concentrate, of an organic friction modifier containing at least one hydroxyl or amino group selected from the group consisting of glycerol esters of higher fatty acids; esters of long chain polycarboxylic acids with diols; oxazoline compounds; alkoxylated alkyl-substituted mono-amines, diamines and alkyl ether amines; and mixtures thereof, wherein said organic friction modifier and said hydrocarbyl phenol aldehyde condensate are present in amounts providing a ratio of mass % organic friction modifier to mass % hydrocarbyl phenol aldehyde condensate of from about 1:3 to about 1:7 and said overbased metal detergent and said hydrocarbyl phenol aldehyde condensate are present in amounts providing a ratio of mass % basic metal complex to mass % hydrocarbyl phenol aldehyde condensate of from about 1:7 to about 23:1.