Customer Ratings & Reviews

I've been using this in my 2018 6.6L Duramax and my son's 2007 6.6L Duramax (While he's out of the country) since it began with the cold weather, making sure to dump it in just prior to fueling. I've had no issues whatsoever with either truck. I run them both for longer trips at least once a week and mine I run around 'town' all the time. NOTE: This winter has not been particularly cold so it looks like the All-In-One is doing just fine. If the winters get bitterly cold you may have to add some Amsoil Cold Flow to aid in the volume of fuel to cold ratio since the amount of the other additives must take up some room in the 16 oz bottle. I must also say the reverse ounce labeling on the side of the bottle makes it very easy to tell how much you're putting in the tank, well done! On a final note, it is extremely handy to have the four additives "All-In-One!"

Very good product goodbye again

Even at our rural address orders are the next day delivered, that's awesome and AMSOIL is the benchmark for quality products. Even in the coldest temps and harsh conditions this Diesel treatment works.

Keeps the old girl purring

Haven’t had any gelling issues with #2 fuel at 0 degrees

Truck not plugged in and fires right up with not issues.

I’m using Amsoil for a long time.. oil, coolant , additives… and, as usual and always, all the products works just great. Including this winter additive; living in Chicago, I had the chance to use it for a really low temperatures , below 20, below 30, etc, and I never had an issue with the fuel being gelled up. You have a lots of options on the market, but, for me , it’s only Amsoil . That’s it.

I have an aging bmw diesel. 120k now. First I had a check engine light for the cylinder 2 injector. I changed the filter have ran this with every fill up and the light has gone away. I’m also getting 5 mpg better since. I haven’t done anything else. I’m not sure this is supposed to do that, but I’ll keep running it since I’ve had great results. Been gettin 36 mpg, and 550 miles per full up on a completely stick x5 35d

After using the product the second time my fuel economy increased from 14 L/100 to 12 L/100, definitely worth the purchase where I average 10,000 kms per month, definitely recommend.

I’ve been using Amsoil since 2001 - more of the same a great product. I no longer have a diesel truck, but I do have the 80 gallon auxiliary tank and a diesel tractor - and it’s 100% Amsoil. I use the tractor to mow my lawn, landscaping with the front end loader and snow blowing 400 feet of driveway as well as have a generator for the PTO.

Got a Refreshed 2022 Silverado 155 w/the 3.0 Duramax. I really like the truck. Being a diesel mechanic I realize that the fuel sometimes isn't treated for the temps so I throw a bottle in every fill up during cold weather to keep the fuel from jelling. It also help keep the injectors clean and up the cetan a bit. I've also noticed a slight bump in milage

Try this for for month , start to see difference

Allowed a better mileage, cleaner burning fuel and definitely better flow in cold.

I have 8 diesel cars and trucks and use Amsoil Products in all of my vehicles. It is supposed to be -3 degrees in the next several days and I have trusted the ant-gel additives and we ran well last year at -3 degrees and no diesel gelling! Thanks! Jim Kyle in TN

Have not had any adverse effects or jelled fuel using this product. As for the other stated benefits?

Must have for any diesel during winter time. The extra protection of no fuel issues during winter is a must.

I also trust this product in my 2007.5 chevy 2500hd LMM DURAMAX in both summer and winter. Thanks.

This is a great product and I feel better when I use it. I believe I get better fuel economy but haven't checked closely enough to know for sure.

Seems to work as advertised. No issues.

I use this product in the winter and Amsoil injector & cetane boost in the summer. No issues what so ever.