This morning it was -9deg Fahrenheit and I believe it got down below -16 last night. I don't have any fuel additive in my truck as I only run 2 stroke oil. I was able to get the fuel inside the filter warm enough to get me to school with 10 psi of fuel pressure . After some classes I went and bought some diesel 911, and poured a little more than the suggested amount into the tank. The fuel pressure returned to normal as expected. Will having the 2 stroke and diesel 911 in the tank together hurt anything?? Is there a different additive I should use during the winter instead of 2 stroke? Or should combine 2 stroke with something else during the winter? I know plugging it in would be best, but living on the 3rd floor of an apartment makes that option impossible. Thanks in advance!