This morning 3 trucks in our small fleet had gelled diesel. We buy diesel that is supposed to be treated and add additional treatment when it is cold but still had trouble. This morning 5 semi trucks were along the interstate by my house with hoods up and gelled fuel. It was -18 with a wind blowing. It’s not worth trying to save money, just buy the treatment and use plenty. This isn’t the fuel filter you want to see.![]()
Use Diesel Treatment in Cold Weather!!
Discussion in 'Experienced Truckers' Advice' started by OldeSkool, Feb 9, 2026.
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48Packard, Suspect Zero, lual and 15 others Thank this.
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Curious, What is the procedure to get that truck running, If your gelled up road side. I've had gelled fuel with my N14, I would put in 611in the tank. FIll the filter with powerserve and the pump would self prime.
My newer DD15 I'm not sure how to fix if gelled. The fuel line and tank would be gelled also, I presume. Put 611 in tank then change filter, prime by hand would be difficult.
Is the only solution to have the truck towed and thawed out inside a building or tarped and use a torpedo heater?Lite bug Thanks this. -
-18 don't shut off
RockinChair, Short Fuse EOD, TurkeyCreekJackJohnson and 1 other person Thank this. -
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If it was forecast to get down to -18 I’d run #1 before I waste money on additives. If the place you’re buying fuel from isn’t blending with #1 and is only getting cold flow improver from the rack then it’s only good down to about zero. Also there is such a thing as using too much additive and having clogged filters v
Opendeckin, tscottme, Sons Hero and 7 others Thank this. -
I used Diesel 911 which is probably basically the same thing you’re talking about. I used a jug and a half in each tank. They were nearly full. After an hour or so the diesel seemed fairly liquified, so I replaced the fuel filter and started it. It ran about 3 minutes and died. The filter was totally plugged again. Dumped Diesel 911 in the fuel filter housing and replaced the filter again. Started the truck and quickly drove it into a heated shop, about a minute drive away thankfully. The filter was already gumming up again. It’s sitting over night and tomorrow I’ll put a new filter and let it run for an hour or so then check it again. Hopefully it will be good to go. It’s a DD16 Detroit. The truck would always start and run about 5 seconds before dying and the manual fuel pump worked easily.ElmerFudpucker, Flat Earth Trucker and Feedman Thank this.
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It sat over the weekend. It was my fault, I didn’t use enough treatment in it. In my defense the diesel my company buys is supposed to be treated though.Numb Thanks this.
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I love the fuel up here in the north. Never seen it gel, no additives needed.
shatteredsquare, Opendeckin, lual and 5 others Thank this. -
This is what I meant to say The red bottle 911. Problem with my tanks. I can't see inside thru the anti-siphon sleeve in tank. Was guessing about condition of fuel . -25. Thankfully it started fine.
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#1 is not always a solution. I got a 75/25 #1/#2 blend in my lonestar and 100% in my ram, my landlord got pure #1 in both his trucks and so on. We all gelled. Just use additive regardless. Cheaper then ruined filters. Tbh im wondering if the #1 aint some new cheaper or epa friendly blend now.
as for getting it started on the road. 5 gallon bucket, filter wrenches, a bottle of 911 into the tank if the tanks are gelled. And a bottle or 2 of howes to backfill the filters with (howes is safe to fill filters with since its mostly diesel, just dont pull the filter plug before you fill so its still filtered and pull plug before you install). Also be careful with the 911, if you overtreat it can actully CAUSE gelling issues.Feedman, bryan21384, MACK E-6 and 1 other person Thank this.
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