Still mystery to me - different brands

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Jan 17, 2003
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i go in waldo mart
supetech at 84 cents (throw them out cause of quality concerns and walmart specifies "cheap"

But consider
Mobil "clean" oil at $110
havoline at 1.26
some of the castrols, quakers at 1.76
and maybe other for a touch more 2.10
not counting premisum oils

I have read a lot of these forum topics and have a somewhat chemical background (hey maybe thats the problem)

I can not really tell what the differences are. people talk about group one, 2 etc and all their favorites etc.
Is there a summary anywhere?
Or is it like consumer reports said, all api graded oils are the same?????
 
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