The engines are not $1100. On the other auction site now, the 75ax is 319.99 and the 120ax is 369.99. I'm sure the 55ax will be even less. I cannot speak to the oil. I can't fathom what sort of oil it "requires" that costs $39 to treat 4 gallons. The glow plugs are sized different, so you have to get the BE-3 plug.