I used it years ago when I was doing the engine work on a "Late Model" stock car team. The engine survived overheating, overreving and general abuse night after night with no problems. To me, it's the best out there. I just think it's a bit overkill for your typical 2600 rpm diesel CUT. A close friend is semi retired from farming. His sons run the business and have numerous tractors and skid steers. They get 10,000 to 11,000 hours out of a piece of equipment before they sell it. They buy a local brand Cling-Tuf 15W-40 diesel in 55 gal drums for about $1/Qt. I use synthetic diesel because of the cold weather starting properties, not long term durability. Bottom line, use it if it gives you piece of mind, just realize it's really not necessary in a CUT that will never approach the number of hours most commercial equipment does on good old dino juice.