I have 2 OS engines, 65 LA and a 55 AX. I have flown both in 20's and the 30's. I was told by a hobby dealer today that if I fly in temps below 50 that I will wear the engines out. He said when the warmer temps come, the engine will not idle after it gets hot. He said and ABC engine will do that. I thought I could fly year round, but I am not sure now. Any comments?