Bardahl Manufacturing Corporation

Hugh A McNeil

Arthur J Kiehn

Improved performance of two-cycle and four-cycle engines is achieved by adding to the oil or fuel of such engines a composition that contains a copolymer of an alpha-olefin and a dialkyl fumarate or maleate and/or a synthetic diester compound that has about 30 carbon atoms. For two-cycle engines, the composition preferably contains both chemicals, in addition to an octane booster such as methylcyclopentadienyl manganese tricarbonyl. For four-cycle engines, the composition contains at least one of the copolymer and diester, in addition to a molybdenum or bismuth salt, dimercapto 1,3,4-thiadiazole and sulfur-phosphorous EP and/or chlorinated paraffin. The composition can also act to improve gear and grease lubrication and provide improved lubricity to fuels.

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Seattle, WA, United States of America

Hugh A McNeil