for the second year in a row, we have blown out the side of the oil resivior on my dads 6x6. the first time was our fault, we tried to push it through a foot of fresh snow from our cabin after only letting it warm up slightly. our bad. but this past weekend out at the cabin, we rolled both it and my 2000 yamaha big bear up to the fire pit and let them thaw out for about 35-40 minits next to a nice little bon fire. yamaha started right up so i turned it around to toast the other side a little bit. went to start the 6x6, the carb was froze still so we had to thaw it out first. started it and let it run for 20 minits before moving it. about 3 minits after we moved it to load up BANG the oil tank burst again. 14 degrees out, another crisp clear walk 8 miles through the frozen forrest and swamplands to the trucks for my dad and his new wife from hawaii, and never been in temps below 63. so the questions are, finally, why does polaris make a machine you cant drive in the cold? do they make an after market tank with a pressure valve or something? is that a possible mod i could make? does any one else have or heard of this problem?