All thru the '70's & early 80's I semi trucked as well as had total of 5 semis with drivers on them. In fall to late spring we ALWAYS carried 10 gal of regular gasoline with us.
Depending what part of the country/world we were in, when it got cold & couldn't find #1 diesel or kerosene we would have to fill up with #2. And then we added 4-5 gal gas per 100 gal of diesel.
We ran all over US, western 1/2 of Canada, as well as Alaska. Mostly heavy haul. Mostly permit loads couldn't run at night so we'd have to park & idle all night. If fuel wasn't winterized, even with engine running & the kind'a warm return fuel going back to tanks, weather get cold enough even the tanks could gel.
One morning about 2 hr after sun-up I was ripping down I 94 about 30 mi west of Glendive, Mt & truck suddenly died. I dipped my tanks & fuel was like very thin jelly, it had gelled. Turned it was -38* below & I had bought #1 diesel at last full-up, I thought.
Round here when it gets nite time temp 10* or below I always add additive or gas or both to my diesel trucks & tractors!!!!