Customer Ratings & Reviews

I have used Amsoil additive for my diesel truck for years, but normally am not in a 0-20F weather for very long so I never really used it before. I order some for a recent trip and it got down to 8F and I had no issues. I also bought the diesel All In One to add after each fill up, after giving my tank a shot of the "Cold Flow". Truck ran great as always and I recommend using it, if cold weather is in your future. I also was at a gas station and their pumps could not pump the diesel from their tanks, I had to go to their other station normally for semi's as their pumps were working for diesel, the attendant told me it always happens when it get real cold. Should have suggested "Cold Flow" :).

I've gelled up multiple times while using the white bottle (starts with P) and clear bottle (starts with H). Since switching to cold flow over a year ago I have not had a problem. Just another rock solid product from Amsoil.

Im sure the product is above the average as all Amsoil products, but the bottle is an odd size and only treats 20Gal at this mixture so for us 30 gal tank owners, a clear bottle or one with a see through strip to see the 1/2 way point would be great. Or get the measureable bottle like others have

Use this in my 21 silverado 3.0L diesel, very good product.

I use this fuel additive regularly about every other fill up. It does what it says by keeping my fuel system and motor clean and running in smooth.

My car just runs great in the winter with this product!!!

This additive is first class

This is used to insure a easy start in cold weather.

Haven't ran it yet

I have yet to have a problem while using this product. Truck has 225,000 miles and not missed a beat. My only concern is it gets a thick when really cold ( in the jug ) but never has gelled. So maybe it’s a 5 star.

Use this in are construction equipment and so far we've and no issues with equipment gelling up, and I live in NY and it get pretty cold. Worth the money

As soon as I started using this I noticed a difference right away the truck runs better, has more power, and is a little better on fuel, I would definitely recommend, wish I found this sooner and is definitely worth the price

Does what it says on the bottle - keeps my truck running smooth in cold conditions. Happy with the results so far and already ordered more. It's convenient that 1 full bottle is (roughly) equivalent to a full 36 gallon tank for me.

Better than any other diesel product I have used in the colder months. Will buy again for my Kubota tractor.

Like the name says. All-In-One. All of the additives you need un one bottle. This is my winter go to. Have been putting this in my 2015 F350 and put it in my Ford Excursion before that. I swear by the stuff.

2.8 Duramax runs better using the All in one compared to not using it. Less regen cycles keeps it running smooth and quiet. Worth it

I add 8 ozs. to 15 to 20 gallons every 2nd or third top off, average 2 mpg increase, Truck starts faster and runs smooth, Started using at24,000 miles, 71,000 currently and runs like new. Will continue to use.

With the price of diesel I have been doing 20 gallon purchases and this size is perfect for that. Love the mileage I'm getting with this product.

I've been using Amsoil since late 80's, it has been great for my vehicles.

I've been using the all-in-one for a little while now and have seen a positive difference in the way my truck runs.