engine oil additives
OK changing oil regularly is good for you, but what if you're brainwashed and think additives will increase life of your engine? Has anyone with real life experience with any of the hundreds of products out there? Do they actually help decrease friction and extend engine life or are they a waste of money? At one time I used to use Marvel Mystery Oil that seems to actually help remove sludge from engine and made it run better. Anyone tried anything of use?
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