Our first big cold snap hit last night(-8), the truck started and ran fine, just 5 minutes down the road it started to gel up. I limped down back back roads to get to work after dumping in some 911 and still wouldn't build pressure past 10K. I have always run powerservice, and only had a couple issues and that was to due to biodiesel. What are you cold weather guys running for additives or do you guys just recommend going with a fuel pump heater.