| abstract |
additive package for a lubricating oil composition, lubricating oil composition, and use of an additive package. An additive package for an internal combustion engine crankcase lubricating oil composition is disclosed, which additive package comprises or is produced by mixing: (a) 5-99.4% by weight based on the mass of the package of additive of a lubricating viscosity thinner oil; and (b) the following additives: (b1) 0,1-10 mass% of an active substance based polymeric friction modifier based on the mass and additive package of which the polymeric friction modifier is the product of reaction of (a) a functionalized polyolefin, (b) a polyether, (c) a polyol, and (d) a monocarboxylic acid chain terminating group (b2) 0.5 to 10% by weight based on active substance , based on the additive package mass of one or more non-ash organic friction modifiers including a polar terminal group covalently linked to a monomeric oleophilic hydrocarbon chain |