Originally Posted by flamarallenjr
Well here go my take on an old thread about fuel injector cleaners. I've been using Marvel Mystery Oil for around 26 years and the results have been good. I put 216,000 miles on a Saturn SW2 wagon and used only M.M.O. in it and never had any injector problems. One really good use of this oil is an engine sitting for along time and not run is to pour this stuff right down the intake (or as close as you can to the pistons) it's will release the piston ring so they won't break on start up. Best results is to let set over night. Anyway thats only one more opinion.
Yep mmo is the best use 4oz to every 10 gallons of gas., for the oil 1 bottle 32oz and 4 quarts of oil run it about 2 thousand miles man my oil came out blacker then black and the engine runs smooth..😄😄