Abstract: The present invention provides a lubricating composition at least comprising: a base oil; and a detergent; wherein the detergent comprises at least 30 mol %, based on the total amount of detergent, of a sulphonate detergent having a B1SI (Base Number) of from 0.1 to 80 mg KOH/ g; wherein the detergent comprises from 30 to 70 mol %, based on the total amount of detergent, of a phenate detergent; wherein the lubricating composition comprises at least 4 wt. % of detergent, based on the total weight of the composition; and wherein the lubricating composition has a TBN (total base number) (according to ASTM D 2896) of at least 10 mg KOH/g.

Abstract: The present invention provides a lubricating composition comprising:—a base Oil;—a detergent; and—an amine compound having the following general formula (I): R 1 NHR 2 (I) wherein R1 represents a hydrocarbyl group containing 1 to 50 carbon atoms and R2 is selected from the group consisting of H and a hydrocarbyl group containing 1 to 50 carbon atoms; wherein the amine compound is present at a level of greater than 0.3 wt % by weight of the lubricating composition.

Abstract: A lubricating composition comprising a base oil and one or more additives, wherein the composition has: a sulphated ash content (according to ASTM D 874) of at least 0.1 wt. % and at most 0.60 wt. %, preferably at most 0.55 wt. %, more preferably at most 0.50 wt. %; and a total base number (TBN) value (according to ASTM D 2896) of at least 8.0 mg KOH/g and at most 15.0 mg KOH/g.