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Old 11-30-2013, 02:00 PM
  #25810  
Jim Branaum
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Originally Posted by hsukaria
This brings up the point that the biggest cost in the fuel is the oil, regardless whether it is glow or spark ignition. True that gas consumption rate is much lower than methanol, but a gasser with high oil requirement will not save $$$ nearly as much as an engine with roller bearing conrods. Why don't engine manufacturers sell glow engines with roller bearing conrods? It would cost more up front, but save a lot of $$$ in the long run, just like gas engines with roller bearing conrods. Heck, a glow engine with the added roller bearing cost can't cost more to manufacture than a gasser with roller bearing conrods PLUS ignition PLUS pumper carb.
Pretty sure the roller bearings and con rod changes would weigh enough to have a significant negative effect on the engine performance, regardless of fuel. We won't even begin to swagestimate the added manufacturing cost of those tiny rollers or the added assembly costs.