Bests & Worsts Reviews from Amazon

I'm an old guy who tried Slick 50 back when it first came out...didn't work. I tried many other additives in the year's since, and...they didn't work. As an owner of LOTS of vehicles--from 4-bangers to supercharged V-8's, two-cycle V-4's to 1 cylinder high compression motorcycles--you could say I'm an experienced motorhead. This is the first additive I've ever used that actually worked as advertised. About 50 miles after being poured into the crankcase, my 2500 heavy duty pickup felt silky smooth, became much quieter, and my MPG's increased by half an MPG while towing a 7,000 lb. trailer. This is one incredible additive and I am now a life time customer.