Ok guys, bear with me. To start off, I appologize, I know I've asked lots of questions about what oils to use in my jeep over the past year, and everyone has been very generous with answers. hopefully this is the last time I'll have to ask. After trying different synthetics in it (currently RTS 5w-40), I've finally decided to go to a dino 5w-30 and stick with it. Well, once my GC stash is used up anyways With all the offroading I do, and all the short runs I do on the weekdays, I just don't feel comfortable extending my OCI past the factory recommendation to really take advantage of synthetic. I think my biggest deciding factor is that we have a plymouth minivan at work with the 3.3 V6 (basically same engine as mine) with 249,000 on it and it runs like a top yet. And it has had a steady diet of Napa 5w-30 at 6,000mile intervals. Thing runs great yet. So anyways, I'm trying to decide between Valvoline, Pennzoil, Quakerstate, or possible Valvoline Maxlife (semi-synthetic). I know Maxlife usually has a great add pack and runs a little on the thicker side, but I figure i'm a long way off from needing to use it. As for the others, I know everyone here recommends the Pennzoil YB all the time, but I just thought I would through this out there and see what kind of responses I get. I was always brought up to believe that Valvoline was some awesome stuff by my dad, but this site has taught me differently. As for the Q.S., I guess its just intreguing to me because of the price, and the fact that it should be pretty close to the YB formula wise. What do you guys think?