The taxis were tested with identical engines, rebuilt and installed for this test.
75 taxis, 22 months, 4 1/2 million combined miles
Then the engines were removed, and the con rod bearing weighed, and the camshaft lobe surfaces measured, and the lifters measured for wear.
Among the 20 most popular oils, there were no differences in the wear on the engine parts.
So... it's been proven that so long as you use an oil that has been marked with the industry standard starburst symbol, it doesn't matter what name brand you use. None of them changed the amount of wear on the tested engines.
http://www.xs11.com/xs11-info/xs11-info/articles/51-consumer-reportstruth-motor-oils-july-1996.html
75 taxis, 22 months, 4 1/2 million combined miles
Then the engines were removed, and the con rod bearing weighed, and the camshaft lobe surfaces measured, and the lifters measured for wear.
Among the 20 most popular oils, there were no differences in the wear on the engine parts.
So... it's been proven that so long as you use an oil that has been marked with the industry standard starburst symbol, it doesn't matter what name brand you use. None of them changed the amount of wear on the tested engines.
http://www.xs11.com/xs11-info/xs11-info/articles/51-consumer-reportstruth-motor-oils-july-1996.html
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