Lubricating oil composition containing two molybdenum additives

A lubricating oil composition which exhibits improved fuel economy and wet clutch friction properties, said composition comprising:

• a) an oil of lubricating viscosity;
• b) at least one overbased calcium or magnesium detergent;
• c) an oil soluble dimeric molybdenum compound present in such amount so as to provide up to 2,000 ppm Mo in the composition;
• d) an oil soluble trinuclear molybdenum compound present in such amount so as to provide up to 350 ppm Mo in the composition;
• e) at least one organic oil soluble friction modifier;
• and
• f) at least one zinc dihydrocarbyldithiophosphate compound, wherein said composition has a TBN of at least 3.6 attributable to said overbased calcium or magnesium detergent, a NOACK volatility of about 15 wt. % or less and phosphorus in an amount up to about 0.1 wt. % from the zinc dihydrocarbyldithiophosphate compound.