HelloAll,

I'm new to nitro RC and my wife recently got me an ofna ultra lx1. I've broken in it in the past week and have run about 3 -5 tanks after that. I broke it in in colder weather (about 30-40 degrees) and have tuned it in the same weather. My lhs said this is fine and these engines like the cold, I also read that running it in weather that is too cold could ruin the sleeve and piston and they may have to be replaced when it warms up out due to metal expansion.

Any thoughts would be much appreciated.

Thanks