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I appreciate your replies, I had ordered a quart of Tufoil to use in my new car after breakin mileage was achieved. Am returning it to seller for refund. Is there any additive that actually helps in increasing mileage and engine life? I have a 4 cylinder engine and want to help it last longer...

Is this additive when added to oil a good product, I have used it in the past but wonder if it has a positive benefit? I looked on site and couldn't see any info on product. TUFOIL /Thanks

What abbout those engines you see running at swap meets etc without oil in pan ( drain plug removed etc) Is this snake oil?