Just found this site while I was trying to find information on how often to change synthetic oil. I've been doing it every 3K and that was getting expensive since I use my truck in my work. Now I'm trying to hold off for 5K miles, but old habits die hard. I have the Step-Side, which I wish Toyota would consider putting out again. This thing is awsome looking and the thought of trading it for the more box looking Tundra hurts me. I get comments and offers to buy almost every week. I also get a lot of "is that the new Tundra" comments. Since it's a 2004, that makes me feel pretty good.