Got a question for u guys ... i took my car ( '94 318ic ) to my mechanic for an oil change.. and when i went to pick it up he told me that by "mistake " he used syntetic oil Mobil 1 on my car .And that from now on i can use just syntetic oil .The ? is , is that true ? Can't i switch back to regular oil ?And is there a big difrence (* besides the price ) between the regular oil and the syntetic one ??
