Another good subject for a post in a warning thread would be Slick50 and other potentially damaging additives and solvents. We need a list of snake oil substances for this.
Anyone remember the name of the oil additive that foamed like crazy when added to engine oil? Some guy created a motorized test chamber with gears to froth up some oil and test the anti-foam properties. The oil with this additive became almost white with foam while the unadulterated oil remained fairly clear.