A low viscosity lubricating oil composition having a CCS viscosity less than 3500 mPa.s at 25 C. and having no more than 0.16 mass % of phosphorus which comprises a dispersant, and a detergent of calcium or magnesium or both; and optionally a zinc dihydrocarbyldithiophosphate, a viscosity modifier, a...http://www.google.es/patents/US6720293?utm_source=gb-gplus-sharePatente US6720293 - Low viscosity lubricating oil compositions
