I keep up on the diesel fuel additives to prevent the fuel from gelling. Last winter I ran it at -25ish, full throttle I couldn't get over 45 mph. It was struggling, that's when I remembered I hadn't treated the fuel in a while. A quick stop at the diesel pumps and a bit of Power Kleen and it was back alive.
Currently -24
As a former diesel tech I’ve dealt with a lot of gelled fuel. I’m glad you are on top of it and know the way around if need be.
Last week I treated the fuel in my truck, I rarely drive jt and it still has 50+ gallons of fuel from probably July.
It’s currently 3 degrees in southern Missouri where I am.. I am guessing tomorrow I have 5-10 trucks show up gelled up.