[R-390] Marvel Mystery Oil Does Turn To Gum

[ToddRoberts2001@aol.com]

I think some people in the past have recommended using Marvel Mystery Oil or 
mixing it with another lubricant as a good way to lubricate an R-390A RF 
Deck? I thought I would relate an experience I had with Marvel Mystery Oil. I 
had a can of the stuff sitting in a cupboard for about 15 years. Some of the 
oil leaked around the top of the can and after being exposed to the air for 
15 years it did indeed turn into some kind of sticky red gummy substance. It 
would seem this is not a good indicator of the oil for use as a lubricant 
exposed to air over a long time = 15 years or more? It looks like Synthetic 
oil or grease would be the best bet for a long-term lubricant exposed to air? 
73 Todd Roberts WD4NGG.