First of all I want to say that you guys on this site are great--a little crazy at times (sniffing oil? haha)--but all in all a very, very informative site. I have been using Pennzoil 5W30 in a 1992 GMC Sonoma 4.3lv6 with 100K miles since its third oil change. The truck still runs great and I've never went over 3,000 miles on an oil change which I have learned may/may not be a good thing from reading these posts. Well believe it or not there is a auto parts store about 40 miles from me that stocks Schaeffer's oils on its shelves so I thought I would give them a try. I chose the Series 7000 5W30 blend as I have never had any trouble from the 5w30's before. Using a Wix filter which they also stock on the shelves although I usually use a PF52 Ac/delco. I am taking a trip to Decatur,IL this weekend which is about a 800 mile round trip and will keep good records on my gas mileage. I also like the green color of the Schaeffer's--kind of stands out from the crowd. Sorry for rambling--we people in Kentucky can really talk/type when we get started.