Years ago, Bobby Tom with K&B told me that they looked closely at Marvel Mystery Oil as so many people were using it as an after run oil. He said that it had many characteristices of ATF and told me that it would be cheaper to just run ATF.
He never said that they found that Marvel or ATF damaged their engines.
I like to mix ATF and Rislone, 50-50. I can't remember who turned me on to this mixture. I use this when puting my engines together. The ATF will flow into the tightest areas and the Rislone does not run out quickly.
There is a lot of smoke when I fire up the next time. But, there are no dry spots in the engine.
Al Hobbs
He never said that they found that Marvel or ATF damaged their engines.
I like to mix ATF and Rislone, 50-50. I can't remember who turned me on to this mixture. I use this when puting my engines together. The ATF will flow into the tightest areas and the Rislone does not run out quickly.
There is a lot of smoke when I fire up the next time. But, there are no dry spots in the engine.
Al Hobbs