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Vehicle Evaluation of Synthetic and Conventional Engine Oils
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 1, 1975 by SAE International in United States
Annotation ability available
A five-vehicle, 64 000-km test with 7.45 litre V-8 engines was conducted to determine if synthetic engine oils provided performance sufficiently superior to that of conventional engine oils to permit longer oil change intervals. The results show better performance in two areas of deposit control; inferior performance with respect to wear protection; and essentially equivalent performance in the areas of fuel and oil economies. Based on these data, it was concluded that synthetic engine oils do not provide the necessary performance required to safely recommend their use for extended oil change intervals. In addition, a cost analysis shows that the use of synthetic engine oils, even at a change interval of 32 000 km, will essentially double the customers' cost compared with conventional engine oils at GM's current 12 000-km change interval.
CitationRodgers, J. and Kabel, R., "Vehicle Evaluation of Synthetic and Conventional Engine Oils," SAE Technical Paper 750827, 1975, https://doi.org/10.4271/750827.
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