Patent ID: 6140282
Filing Date: 2000-10-31
Classification: C10M,C10N

Abstract:
A long life lubricant comprising a major amount of an oil of lubricating viscosity and a minor amount of additives comprising a mixture of detergents comprising a first metal salt or group of metal salts selected from the group consisting of one or more metal salicylate(s), metal sulfonate(s), metal phenate(s) and mixtures thereof having a high Total Base Number (TBN) of greater than about 150 or higher used in an amount in combination with the other metal salts sufficient to achieve a lubricating oil of no more than about 0.6 wt % sulfated ash content, a second metal salt or group of metal salts selected from the group consisting of one or more metal salicylate(s) metal sulfonate(s), metal phenate(s) and mixtures thereof having a medium of greater than about 50 to 150, and a third metal salt or group of metal salts selected from the group consisting of one or more metal sulfonate(s), metal salicylate(s) and mixtures thereof having a low/neutral of about 10 to 50, the total amount of medium plus low/neutral detergents being about 0.7 vol % or higher, based on active ingredient, and the volume ratio, based on active ingredient, of high detergent to medium plus low/neutral detergent is in the range of about 0.05 to 1.05, and wherein at least one of the medium or low/neutral detergent(s) is metal salicylate.