i will admit i am a amsoil dealer right off the bat and not lokking to sell. i personaly run the amsoil kit on my 6.0 and run the FS2500 on my excavating equipment. i have seen no difference between the kits. they both have an excellent technology behind them, and both work great on my truck and mini-excavators. i prefer the amsoil kit because of the availability, and ease of ordering. i became a amsoil prefered customer a couple of years ago to save some money. when friends of mine found out that i was running the stuff they were interested but didnt know how to get it so i became a dealer. i do it to help educate others and save myself some money. with what ever kit you go with do your home work and make sure you spend the money on the billet oil filter and oil fill caps, this makes it very easyto install. if you have any questions on the amsoil kit feel free to pm me.