I bought the diesel in August. I agree, this made a believer out of me. I was reading my manual as I sat in disgust and it actually says to use 100% #1 when the temp is below 7 degrees F. I have another question. Should I drain one half of the tank out and add at least 50% #1 or do additives actually make #2 perform like #1? I'll keep you guys updated. I plan to try to fix this today. It's still blizzarding here. The only way to town right now is via snowmobile. We had a very harsh winter last year and the snow from the last 36 hours is worse than anything last year. Thanks for the help.