Customer Ratings & Reviews

It runs cooler worth every dollar

This is just what my Kubota tractor called for. I installed a block heater so I had to drain the coolant that was in there. This was just the ticket to replace the old coolant.

Everyone knows 6.0 powerstrokes are picky when it comes to coolant and oil. When my local stores stopped carrying silicate and nitrate free coolant I was stumped on what to buy until I found this. It meets every mark for what my truck wants and needs. I’m pleased with this coolant!

I bought this product for its mileage performance and used it for my 2000 Isuzu NQR 4.8 Diesel because I'm going to drive it from the USA to Central America. It's a bit expensive, but it's good.

I have been using Amsoil in all my vehicles. It has proven succes with me for the last 20 years. I had to tear alot down to change coolant on my quad. I don't want to do that again anytime soon. So the 8 year life span really appealed to me. Having been an Amsoil customer, it was the logical choice for me.

I did my flush on my C4 and C5 Corvette in Florida, I’m moving up to Ohio in the next month, and I brought them up to my new house and have them garaged then both I checked on this when I got back up here and it’s cold as all get out here check antifreeze everything was fine . I Love AMSOIL I use AMSOIL in all my cars and truck.

I pay a little more for this Heavy-Duty Antifreeze & Coolant because it's designed to reduce flush and replacement intervals which is a work saver and I trust that it's not corrosive.

I use this in my truck along with the coolant booster. Great products highly recommend them.

Been using this coolant for a long time, great quality would recommend.

Excellent product, this is the first time using it, my powerstroke has not over temped once since I flushed it and filled it with AMSOIL and added the booster. I'll be using it in all my vehicles from now on. Love it.

All of Amsoil’s profits are top notch..I will never shop anywhere else.

Quality product, I have run this antifreeze for more than 5 years in multiple vehicles with no discoloration or corrosion. Gave it 4 stars due to the price.

It's Amsoil..... can't go wrong!

Everything you needful a Diesel App.******* good stuff! I recommend

See above

This is hands down the absolute best coolant on Planet Earth! I'm never going back to OEM coolant. This far exceeds my OEM coolant by a long shot. There is no comparison. This is just the absolute best. I'm using this in my 2016 SCION iM, 2013 RAV4 Limited, and 2016 Camry SE. It's HOAT just like OEM, but wayyyyy better. If you're thinking it over, think no more, and just buy it already. You won't regret it. I highly recommend this coolant.

After I pulled the original radiator from an 87 Olds Cutlass 442, which was leaking very badly, I dropped a new radiator in and filled the system with Amsoil Heavy-duty Antifreeze and some Amsoil Dominator. Replacing the radiator was necessary to stop the leak, but the AMSOIL products reduced the running temperature...a pleasant surprise.

I had to top off the cooling system in my 2014 Ram 3500 with 209K miles. I switched to Amsoil Heavy Duty when I had the cooling system flushed quite a few miles ago. As with all the lubrication needs on my Ram I trust Amsoil.

I live in Southeast Texas, I run this product in my diesel pickup and I to say it keeps my truck in excellent working condition, daily driving to towing I’m ready.

Good coolant. It's expensive but the good stuff always is. It depends on whether you want something that works and does what it says or something to just get by. If u have a nice car or 1 you care about and u want to keep it protected and running good this stuffs for u. If u need something to just get by then this stuff might be to high. But it is a great product.