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

  So, if I was to make a standing tank for the exhaust the oil will
stay on top (lighter than water?) and the relatively clean water
could be pumped back into the boiler and reused.  I presume the
feed pump would be crank driven and working all the time, like on
those old-timey German engines w/feed-pump I'm still waiting to score.
Ditto for a dynamo steam plant.

  Then again, I've never run an engine long enough for a function
like this to serve a purpose other than proving it works. 

Thanks for the replies,
Wayne