Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I had to make up a batch just for my Stuart #9. I use this mix on all wear surfaces except for the steam lubricator. I use mobil 600w Super steamboil for that. It is cast iron and all.

But my mix is 50% 600w, 25% Marvels Mystery oil, and 25% Canola oil. RAPE seed oil is banned in the US.  Something about the acids and cancer.  But I can truly say that I have done my own small tests and the mix does work. The rpms picked up right after it started to work into the bearing surfaces. I have used it ever since. This mix never goes into the lubricator. 600w super steam oil only for that engine. I had to buy 5 gals of it because thats the only way I could get it.  I had bought oil from PMR and it's just not the same as the 600w from Mobil. PMR's oil may be good for their engines, but not for the Stuarts. Kind of like oiling a Jensen with Wilesco oil. Not the same.

Side note:
My version of Keith's mix smells great!
The 600w Super Steam oil also smells great from the exhaust. If you are a steam fan...then you will understand what I mean.  Certain oils just don't have that smell! 

I must have about 1000hrs,(maybe exaggerated?),on my Stuart #9 plant, and it is still tight! I have to get some videos up somehow.