Infineum International Limited

Philip E Collier

Rinaldo Caprotti

Brid Dilworth

Carlo S Fava

This invention relates to fuel oil, especially middle distillate fuel oil, compositions comprising middle distillate fuel oil and incorporated therein an incorporated therein an additive composition comprising (a) at least one fuel-soluble or fuel-dispersible neutral alkaline earth metal compound and/or at least one fuel-soluble or fuel-dispersible neutral alkali metal compound, and (b) at least one fuel-soluble or fuel-dispersible transition metal compound, characterized in that the fuel oil composition contains at most 0.05 mass % of sulfur, the total metal content derived from (a) and (b) in the fuel oil composition is at most 50 ppm by mass, and the mass proportion of (a) to (b), based on metal content, is in the range of from 1:99 to 99:1.

Fuel oil compositions

A fuel additive composition comprising a solution or dispersion of an oil soluble metal carboxylate or metal complex derived from a compound of the formula: where R, R, Rand Rrepresent hydrogen or a hydrocarbyl having 1-30 carbon atoms (C-C), but at least two of R, R, Ror Rare C-Chydrocarbyl; Ris a hydrocarbyl having 1 to 120 carbon atoms and m and n may each be zero or an integer such that the total number of carbon atoms in the carboxylate is not more than 125.

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Oxfordshire, United Kingdom

Philip E Collier