There's only a handful of companies that makes a true Group 4 full synthetic: Amsoil, Royal Purple, Redline...Originally Posted by Jaimecbr900
Is there anywhere one can research if the oil they are using is truly "synthetic" or not?
There's only a handful of companies that makes a true Group 4 full synthetic: Amsoil, Royal Purple, Redline...Is there anywhere one can research if the oil they are using is truly "synthetic" or not?
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