Fuel efficient engine oils containing molybdenum dialkyldithiocarbamate, MoDTC, friction modifiers can lose their ability to reduce friction during service prematurely. Depletion processes involving antioxidant reactions and interactions with other additives play important roles in determining the performance of these formulations. This paper describes results from investigations of the antioxidant reactions of MoDTC alone and in combinations with zinc dialkyldithiophosphates and a phenolic antioxidant. The effect of supplementary ashless antioxidant on retention of friction reducing capability is described.
Additive Interactions and Depletion Processes in Fuel Efficient Engine Oils
Sae Technical Papers
International Spring Fuels & Lubricants Meeting & Exposition ; 1997
1997-05-01
Conference paper
English
Additive interactions and depletion processes in fuel efficient engine oils
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