Quote:
Originally Posted by TurtleBoy
This discussion comes up every so often. There have been a number of studies that show the difference regarding top tier additive packages versus the EPA mandated minimum additives. I only use Top Tier but many seem to feel like you and not see an advantage to it. Everyone is free to choose what they are comfortable with.
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I doubt the difference is easily observable in most case for most folks who don’t have the equipment to look into the engine