(quoted from post at 07:21:33 11/27/17) Snake Oil. ALL of these products use mineral spirits as the prime ingredient - average about 95%. Do your homework. Search the MSDS (Material Safety data Sheet)on any product to get the poop on what it really is. If the company has none listed and/or says it is proprietary information, be especially skeptical and save your money. MMO, Sea Foam, Kroil, STABIL, et al use it. Mineral Spirits is an excellent substance for cleaning grease, gunk, crud off of parts, engines, lube systems, and will not harm your internal engine or hydraulic system. Now, I am not saying none of these will work loosening up parts and such, they probably do, but don't get fooled into thinking they are really making a huge improvement on engine performance. I use mineral spirits all the time for cleaning parts, cleaning off engine components like distributor, carb, generator, and such before removing from tractor, and cleaning out the hydraulic systems on tractors too. You can also use UATF, diesel fuel, and kerosene as well. None of those either will do any harm to engine internal parts if not fully flushed. I buy mineral spirits in 5 gallon pails and in a pinch one can use Kingsford Charcoal Lighter Fluid -it is the same thing. If you want to spend your $$$ fast and easy, sure go ahead and buy the pre-packaged snake-oil products but for cost effectiveness, buying in bulk the true source is the way to go. BTW, I have put together a MSDS list on the other Ford N-Series Tractor Club web site for easy access to most all commercial products sold today for the mechanically inclined.
...your mileage may vary...
Tim *PloughNman* Daley(MI)