I had 64,xxx on my 98 tour when I got it. I went right to valvoline ( spelling ) max life 10-30 and the car runs great I also run fram filters. And like everyone says get an external tranny cooler. Saves the trans (old b&m off of my 72 blazer) I installed mine and im now at 118,xxx miles and the trans is still smooth as butter. Go threw the car with a fine tooth comb. As for the rest of it go wild. I have seen many ideas up on this site. And nice car for a freebie.