the wife was driving home tonight and gelled up, she had just filled the truck and added Howes fuel treatment, temp was 5deg. Pulled truck home, got it in the heated garage, started a hour and a half later, added 911 desiel service. We also bought new fuel filters but i dont have the tools to put them in, i guess i will do that tomorrow at work. This is the last time i will run Howes, we mixed it as them wanted on the bottle, 1oz per 2 gals.