i heard that once u use synthetic u cant go back to conventional oil...is that true?im wanting to change my oil tommorrow and i want royal purple because i heard its the best...is rp synthetic?
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synthetic to conventional?
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Synthetic never saved any of my cars
Royal purple was in my civic when it blew.
Mobile1 was in my accord when it blew.
Its not worth paying so much for oil. Using regular oil and doing more regular changes is a better bet. Don't worry about changing oils. You'll be fine. Royal purple is synthetic.
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