Try the "bad" ones as well (make sure they are the correct viscosity for your engine), you'll be surprised.
I'm saying this because there are many of these 3rd party comparison tests that are carried out using the wrong method that in the end present information that is not relevant to engine lubrication. Just like that oil test article from the Holden forum. The test method they used was for gear oil, but they applied it to engine oil instead, which doesn't return meaningful information because the method that friction is generated in an engine is different to that in a gearbox.



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