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

You are correct. I should have mentioned part of my between run routine, aside from oiling all the spinny, slidey bits, is a drop of MMO directly on the spring and guide of the top mounted intake valve.  Plenty enough oil wicks down into the combustion chamber and onward to the ring. I also note the Chinese video online shows quite a bit of oil squirted into the crankcase. I don’t think that’s necessarily a good thing, but a needle oiler giving a little 3 in 1 or whatever to the skirt isn’t a bad thing.