While my 8V92T starts very quickly under best weather conditions, I am wondering about current weather and its effects. My question is, since I do not have a barn or enclosure for my bus (meaning it sits outside) and I keep full electrical power (re 50amp) on it, should I leave the Engine Block Warmer on full time to reduce temperature swings that I am thinking could cause moisture somewhere in engine. All this seasonal weather talk about moisture due to short engine running intervals brings this to mind. I don't mind starting the bus to run for 20-30 mins once a week (usually same time as GenSet) but since we try to take a ride every couple weeks to exercise it, I just wonder what the engine block heater will do. I also give the Webasto a short work out on occasion also. North Central Arkansas is seeing a lot of temp swings from mid 20's and lower at night to mid to high 40's in daytime.