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Projected Lubricant Requirements of Engines Operating with Lead-Free Gasoline
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Abstract
Future low emissions engines will burn unleaded gasoline. Compared with engines of 1970, future engines will have lower concentrations of NOx in the blowby gases, and lower blowby flow-rates; however, oil temperatures will probably be unchanged.
The consequences of these conditions for engines using high quality (SE) oils at current drain intervals are: virtual elimination of rust, reduction of sludge, no effect on wear and oil thickening, and possible worsening of varnish. Therefore, extension of the drain interval with SE engine oils in the future may be possible, but final decisions will depend on the findings of research in the areas of engine wear and varnish, and oil thickening.
Topic
Citation
Gallopoulos, N., "Projected Lubricant Requirements of Engines Operating with Lead-Free Gasoline," SAE Technical Paper 710585, 1971, https://doi.org/10.4271/710585.Also In
References
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