Oustanding treatement for the winter, who eliminate moisture in diesel! In ten years, I never had to emty the water in the water filter of my truck. Wathever of the whim of Mother Nature!

First tank about 20 miles in started noticing a little more pep. Smoother running and idle. By 100 miles definitely an improvement in running. Haven’t had any cold weather at least cold enough to gel. I don’t expect anything but good results from the anti gel properties. If you have been on the fence about it, just buy it and see for yourself the benefits.

Using in a 2025 Sierra 1500 AT4X with the baby Duramax. Don’t have enough miles to give mpg effect but can absolutely state using Amsoil All in One has resulted in a much smoother running engine. Have also noted the consumption rate for DEF has dropped significantly. That in and of itself helps justify the cost of this additive. Highly recommend!

My Cummins gained about 3 mpg. Love this stuff to keep the injectors clean and boost my fuel.

Use this product in winter. Been -25c and truck has no problems starting and or running

I have been using AMSOIL diesel products for a while and they are great. Doing testing for winter weather was fun. I compared several different "cold weather additives". Here in Iowa it does get around -10F and at times -20F with wind chill on average. This year it got to -36F. To my surprise, there were other friends and neighbors that gelled up, including agricultural equipment. (NOT ME) So, for free I used AMSOIL RECOVERY, combined with COLD FLOW. Removed all filters, removed/cleaned/reinstalled fuel water separators if equipped, filled those with recovery and dumped rest in diesel tank. Once started put COLD FLOW and ALL-in-ONE in the tank. The reason for this, the tanks are huge. I needed more COLD FLOW than lubing, but I wanted to also lube the complete diesel fuel system. Once I convinced people that these products are the real deal, this is what they use now. From using oil, filters, diesel products, transmission products. THANK YOU AMSOIL

We’ve had very cold weather. Coldest was -13. I have had no issues with starting and changed my fuel filter yesterday with no signs of gelling with my 2024 gmc with 15000 miles with a 3.0 duramax

Excellent product thx guys

Works great for me!!!

Works as intended. Keeps fuel from gelling in the cold and helps a ton with a cleaner burn.

Great product!

Great product!

I have had good results with All in one diesel fuel additive. We tend to have cold wet winters in rural north Idaho. I don't know what additives are in the fuel at the pump. I run all in one and have had good results. ULSD in this country is alleged to lack lubricity. Emmissions add to the complications and injector pump failure is not unheard of. The fuel system is possibly the most expensive system on the truck to repair/replace. It's easy to order and delivery is lightening fast. I am a satisfied customer. Thank You.

A few treatments in and it seems to be working fine. Really all I wanted was to reduce the chance of jelling and anything else is extra. We'll see.

Pour les diesels en hivers permet de protéger et assure un démarrage sans faille peu importe la température hivernale

If you drive a diesel in the US you should use this every fill up

I add the cold flow as I know quality fuel companies put it in the diesel in winter months, but for me it’s peace of mind.

Même par temps très froid, je sais que mon diesel partira même pas branché... Un petit plus pour ceux qui traite leur diesel aux petits oignons!!

I’ve been using this for a few years now. Many so for the anti gelling feature. But over all I can see an increase in my fuel economy when using it.

Keep the Duramax and me both happy