I have a 2000 Dodge Durango that has approx 25k miles on the engine. The original engine blew at 19k miles, I tried telling them since I bought it that there was something wrong but they refused to listen. At just over 19k miles it went kablooey...long story short I got a brand new engine. So anyway. I've always been a Quaker State user, Dad was and I inherited the trait, but lately I've been doing some reading that QS may not be the same quality it once was. I'm most likely going to stick with a natural oil since my normal driving isn't in the severe category and I don't see the advantages of a synthetic because of that. After doing some reading here and there, a lot here since I just discovered this forum today, it seems that the best readily available natural oils are Chevron and Pennzoil. Chevron isn't easy to find here, went looking tonight on a scouting mission, so it looks like Pennzoil might be the way to go for me. Anyone have thoughts on that? I also have a 1988 Monte Carlo Super Sport with 40k miles on it, I bought it new and it's been babied it's whole life, and I was thinking of switching to another oil in it as well. The car doesn't get driven much, as you can tell from the mileage, but when it does get driven it gets DRIVEN. Any suggestions on an oil for that car as well? For filters I've been using Purolators and Wix since last year. Whichever I can find on sale I buy a ton of, only use those two brands though. A buddy has been trying to get me to switch to cheaper STP filters but until I gather some more data I'm just not sure about them. Thanks all!!!