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Originally Posted by Jeff/Illinois
I had the same experience in our '36 Ford pickup. Started using MMO and the problem went away.
A mechanic told me that today's ethanol gasoline is too 'dry' for the old cars and will eventually cause the valves to stick. The older gasoline formulas lubricated the upper cylinders and valves. Not so today.
Does it actually work? Well, for me it seems to so what the heck, 4oz. per ten gallons and I'm good to go. Half a quart in your motor oil at oil change time is supposed to help too, but I shy away from adding anything to motor oil I guess MMO is OK.
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I believe that half a quart is just before the oil change. I believe MMO contains solvents that will clean some of the sludge out of the engine. I used it since my Ford 8N days and in the diesel fuel of my case backhoe. It's a good product. I would not put it into new oil either.
Terry