Bests & Worsts Reviews from Amazon

I wish I had not told a, now former, co-worker about this product. He had an old diesel Mercedes sedan. The car was not running well, smoking, sputtering, etc. I looked at it and told him how to use the product to save the car. He took his time getting around to it and almost sold it to me for 300 dollars. I then asked him if he had used Seafoam yet. He told me no. Was going to sell the car to me in 2 weeks. He then asked me how to use it. I told him to buy 2 cans, replace the fuel filter (spin on type for diesels), and fill it with Seafoam then install. Then take the rest the rest of the first bottle and dump into fuel tank if empty go to fuel station and re-fill then add second bottle or if full already add the rest of the first bottle and then the whole second bottle. He did that, it ran so well he would not sell it to me after that. He told me it ran better then when he had bought it. It also caused the gunk in his tank to free up and plug his fuel lines requiring a tank removal and cleaning. After that it ran like a champ. I use it in motorcycles to avoid rebuilding the carburetor(s). I add one FULL can to the tank. Yes I know it's only a 5 gallon tank but it works. I've seen it used on a VW Bug that had been sitting for a few (5?) years it was used to flush the carburetor and then in the fuel tank with fresh gasoline. It cleaned out the tank so fast that the fuel filter plugged up and stalled the car out on the side of the road on the first run. I also use it to help flush an engine before an oil change, I use it to clean out carburetors when I do rebuild them, and thinking about using it for an 'on the fly' engine cleaning/smoke screen system. I've used it to flush the stale oil out of a motorcycle it seems to have cleaned the clutch plates up and made them grab better but that might have been just in my mind. It's not a cure-all but if you understand how to use it it works great.