Quaker State, Valvoline

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I've read where Texaco and Castrol's synthetics are "not true" synthetics, but what about the other brands that you can buy over the counter at Wal-Mart like Quaker State and Valvoline? Does anyone have lab results from these two brands?

[ December 23, 2002, 09:09 PM: Message edited by: ryansride2017 ]
 
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