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[QUOTE="CurtisF, post: 1223427, member: 829"] 99% of them are snake oil and a waste of money. Some actually create a LOT of foam issues and other problems. Some can even cause premature engine wear, basically reversing what the oil is supposed to do. No person or company can prove that their oil additive product can definitively prolong engine life out in the real world. Plenty of engines go hundreds of thousands, or even a million miles plus, with nothing more than normal oil changes and no additives, while others have gone fewer miles with religious oil additive use...... and vice versa. No automotive manufacturer recommends oil additives either. If they were really that good, someone out there would have put it in the owner's manual as a recommendation or a requirement. [/QUOTE]
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