My truck runs 10-15 degrees cooler. Towed 5th wheel 2000 miles round trip passing through the Appalachian foothills. Temperature would rise while climbing but would quickly return to normal. I use the gear oil, diesel oil and diesel fuel treatment as well, no gauge to monitor temperature difference. The diesel fuel treatment improved my towing gpm. The coolant and diese fuel treatment is impressive no reason to doubt the benefit of the gear and engine oil.

👍 goes in everything I own

it works great for my motorhome

My truck needed this (flushed), It worked out perfect, I did notice my truck seems to run a few deg cooler.

Great product and quick delivery....works as it should

Recently serviced my Kubota BX 1860 using this coolant. It is a pre-mixed product which is very handy. Expect it to last another 8 years/1000 engine hours.

Using this in very costly important equipment. Always trusted Amsoil so trusting in this product. Hard to justify the cost as other manufacturers have longer warranty’s now my boss has said. My carpet ride I’m hoping will not pull out from under me.