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Posted by erccobra (Member # 1112) on :
 
i have had regular oil in my car and synthetic ,i did not notice any change ,,,now i just read a post it said once you go to synthetic you cant go back ,,is this true
 

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Posted by st5150 (Member # 51) on :
 
That is a myth. Mobil 1 dispels this myth in their oil FAQ on their web page.
 

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