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Opinions are worth what you pay for them. Without scientific testing there is no means to know if one oil performs better or worse than another. Shitty is not a technical term used in the testing of oil AFAIK.
As a side note, I'd be willing to set up a test of six different engine oils including Amsoil, Royal Purple and four other brands. We can take a ten minute drive and if you can tell me which oil is in the engine I'll pay you $100. If you guess wrong you pay me $100. This offer is open to anyone.
Last edited by chris328i; 04-06-2011 at 04:35 PM..
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