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

I want to correct some misinformation... Canola isn't GMO.

Canola has been changed by breeding and genetic modification.

Canola farmers in Australia prefer to plant the GM seeds.

.....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! 

That matches up to my thoughts well about keeping the blend out of the lubricators in favor of straight SCO.  I’ve been looking for a place to buy less than the 5 Gallon bucket of Mobile 600w, but didn’t find any.  Guess a life-of-type buy is in order. 

I know what you mean about the smell of these oils.  While I never sailed on a recip steamer, I’ve spent nearly 50 years around 2190 TEP, and marine steam plants.  There’s something about that smell that makes ya feel at home. I’m guessing the Mobile oil is similar.

Do you all feel this works better than synthetic oils like Mobil 1 and, if so, why?

I have used two light versions of Mobil 1 oil ever since it was suggested by either Gil or Roger and have been happy with it, but I am willing to try the Keith Appleton blend as well, some tiny engines just can't take copious amounts of that thick oil. no one oil is perfect for "every" situation imho.

I had searched for quarts of mobil super 600w forever! Finally broke down and spent $105 for 5 gals. I still have 4 3/4 gal left!

Lifetime supply!

Have some mixed up in a glass jar now, it will be interesting to see if over time the 3 different oils separate -




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I like to stick with the commercial steam oils. To me the finest is Green Velvet. I have bought it by the 5-gallon pail for my 7.5" gauge steam locomotives. Green Velvet was developed by the Skinner  Engine Company for their steam engines. It is not a viscous oil and is light green in color. It is perfect for model engines.