METHOD OF OPERATING ETHANOL FUELLED ENGINES

WIPO Patent Application WO/2009/141580

A8

A method of operating a compression ignition internal combustion engine which comprises supplying the engine with an aqueous ethanol fuel and lubricating the engine with a lubricating oil composition which mitigates problems of interaction between the oil composition and the fuel, the lubricating oil composition comprising a major amount of a base oil of lubricating viscosity and a minor amount of additives comprising one or more nitrogen-containing dispersant additives and one or more neutral or over-based, metal salt- containing detergent additives, the metal salt-containing detergent additives being present in the lubricating oil composition at a total metal salt concentration in the lubricating oil composition of greater than 0 and up to 1 % by weight and the weight ratio of the total amount of nitrogen in the dispersant additives : the total amount of metal salt in the detergent additives being, at least 0.1 : 1. There is also provided such a lubricating oil composition having a total sulphur content of not greater than 0.44 % by weight.

WO/2012/140215	CYLINDER LUBRICANT FOR A TWO-STROKE MARINE ENGINE
WO/2003/042341	LUBRICATING COMPOSITIONS AND CONCENTRATES CONTAINING A THIADIAZOLE ANTIWEAR ADDITIVE
JPH07316577	LUBRICANT OIL COMPOSITION

GURNEY SIMON PHILIP (GB)
LAMB GORDON DAVID (GB)
RENOUF SIMON LEWIS (GB)

PCT/GB2009/001206

July 07, 2011

May 13, 2009

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CASTROL LTD (GB)
GURNEY SIMON PHILIP (GB)
LAMB GORDON DAVID (GB)
RENOUF SIMON LEWIS (GB)

C10M163/00; C10N40/25

PERKINS, Nicholas, David (Global Patents and Technology Law Chertsey Road,Sunbury-on-Thames, Middlesex TW16 7LN, GB)

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