After going blind searching through the... ... (here we go)... Amsoil threads I think I've decided to give it a try. From what I understand, if I only run it to the recommended 7500 miles before changing it is going to cost the same as what I am already spending so why not give it a shot. Now I read so many things that I can't remember what is what so here is my situation. I ran Rotella T and changed religiously at 3k-4k miles until the last change where I tried the Rotella synthetic. I didn't notice any leaks with it but as I understand it is not a full synthetic. With just over 60k on the truck now should I expect leaks or should it be ok?