Marvel Mystery Oil can be used in both antique tractors. For the crankcase, replace bewteen 10 to 25 % of your regular motor oil with Marvel Mystery Oil. For example, if the crankcase holds 10 quarts, replace 1 to 2-1/2 quarts with Marvel Mystery Oil and the balance, 9 to 7-1/2 quarts, with your normal motor oil. In the case of the fuel tank, use 4 ounces of Marvel Mystery Oil for every 10 gallons of fuel.
If you have a stuck valve, Marvel Mystery Oil will help free this valve. Remove the spark plugs, pour about 2-tablespoons of Marve Mystery Oil down the cyclinder, replace the spark plug. Leave the engine sit for 24 - 72 hours and then start the engine.
