Ok, I am looking at the Lockright lubrication thing and it calls for 85-140 in warm climates, 75-90 in colder climates. I live in both, hot in the summer (it has been in the 90s a few times this summer) and cold in the winter (we hit in the -20s sometimes too). So what would you guys recommend? I do know that when it get F'n cold my tranny 80-90 is thick and takes awhile before it shift. I am interested in options, what about Amsoil synthetic?