I have a 2004 John Deere Gator HPX and have had a problem this winter. It has been VERY cold here in VT and I had a problem with it smoking like crazy when faced with a load. The 1st time it happened it was 5 below zero. I read this forum and see that short trips are bad. The oil was overfull, so I changed that and the filter today. Unfortunately, the oil was milky grayish. I am not losing coolant. Is it possible that milky gray oil is due to condensation? I mostly short tripped a lot this winter doing a project 200 yards away from the house, so some days it just went up and down with tools and putting around the property. I sometimes let it idle for 15 minutes, but it still never warms up. Just today, I put a piece of cardboard in front of the radiator and ran the heck out of it after I changed the oil, and it seemed OK. Are my problems due to a cold machine?