Originally Posted By: Chucksta
Personally, I've used Slick 50 and had it actually do something positive...once, back in the mid 90s'. I had an '82 Daytona turbo, and if it sat for more than a couple of days, it would clatter for 30 seconds to a minute on start up. I poured in a bottle figuring "What's the worst that could happen?" Their marketing premise was that 80% of engine wear happened in the first ten seconds after start up, and that's where I was getting the engine noise.
I poured in a bottle at the next oil change, and really didn't think much more about it. About a month later, the car sat for a week while I was away on vacation, when I started it up, no clattering! Was it a "miracle cure".. was it capable of fixing a fried engine? Ummm... I seriously doubt it, but it DID stop an aging engine from clattering on start up after sitting for more than a couple of days. It never made the start up clatter again, for over two years, until I sold it. Other than stopping the start up clatter... no discernible effect at all. No increase in mileage, power, engine temp... nada.. With additives, if they even work at all, it would seem that the best thing to do is pick the one that (claims to ) target a specific problem.
The Teflon particles in slick 50 in the 90s were big enough to get filtered out by the oil filter,which then plugged your oil filter causing it to send unfiltered oil through the engine.
So basically you plugged the filter which may have helped exercise the by-pass valve helping it close so at start up it held oil to the top end,instead of it draining back into the pan.
Teflon is bad news in an engine
