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Terry, NJ · 11-21-2017, 05:30 PM

I like it for freeing stuck engines. It's a good all around cleaner and lubricant, especially for things that have not been well lubricated and are out in the weather. It's a good upper cyl. lube. I have no problem with adding it to gas. However, I don't think it should be used in the oil, except on the last day or two before an oil change. MMO is basically a solvent for penetrating and cleaning things, not a lubricant. Yeah yeah I know I said it was a good lubricant for rusty stuff, not for engines running at 2500 rpm.
Terry

11-21-2017, 05:30 PM	#7
Terry, NJ Senior Member Join Date: May 2010 Location: Bucks Co, Pa Posts: 3,740	Re: How much Marvel Mystery Oil per tank? I like it for freeing stuck engines. It's a good all around cleaner and lubricant, especially for things that have not been well lubricated and are out in the weather. It's a good upper cyl. lube. I have no problem with adding it to gas. However, I don't think it should be used in the oil, except on the last day or two before an oil change. MMO is basically a solvent for penetrating and cleaning things, not a lubricant. Yeah yeah I know I said it was a good lubricant for rusty stuff, not for engines running at 2500 rpm. Terry