and we have lots of problems with plugging filters! thats why they make a big deal about it. what filter base and filter do you use?I run them and I dont have any issues. I hear alor of people making a big deal about fine filters in colder weather... CAT runs 2 micron filters on their equipment in cold weather. I run antigell in every tank below 32 degrees since I run bio blend (B20) year round. So far ive been down to -15 with no problems running fine filtration.