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Originally Posted by neonlarry
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First of all, I'm a skeptic about most things. I've used slick50 a few times but didn't really have anything to compare whether it did any good. I don't regularly use additives in engines because I'm not sure they do anything beyond what proper maintenance does. But, i'm also skeptical about his results.
It's an interesting "experiment" but it's not scientific. I can see what appears to be steel gears in the "control" tank and what appears to be coated gears in the other tank(what's going to stick to teflon?). I think the results are intentionally skewed to make Lucas look bad and make Shaeffers look good.
If someone has an unbiased test ... otherwise listen to the testimonials.