Quote:
Originally Posted by Triple
When I drain Amsoil after 5,000+ miles of use, it looks the same as when I originally poured it in.
When I used to drain conventional oil after 3,000 miles of use, color would range from dark brown to black glop.
That tells me all I need to know.
Quality filters are important, too, of course.
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Dirty oil doesn't necessarily mean it's inferior oil, it might also mean that it contains an aggressive detergent package, and it cleaned out the gunk in your engine. In fact there are a lot of people who say that about Mobil 1.