Guys, I don't know what to make of it.... Due to the spiking prices of regular oil after katrina, I finally decided to try a synthetic engine oil and stick with it a while to see how it turned out. As close as the price of dino juice is to walmart synthetic, I really didn't have an excuse not to. So far, I have been pleased with the oil's performance. It seems to survive the abuse in the engine when it comes to the "looks" of things. I'm not getting consumption and I keep on comfortably inching out the drain intervals. The oil doesn't seem to look as dirty and shot after some hours as the dino juice does. When it comes to the looks of the oil, I'm not sure what to make of that part. A part of me wants to think the additive package isn't quite as good, so it doesn't clean and get dirty as fast. But on the other hand, I also wonder if it's not just standing up better. However, none of this is really the issue I'm unhappy with. I can't explain it. But despite the fact I was hoping for increased fuel economy, instead I am experiencing a consistantly marked DECREASE IN FUEL ECONOMY. Just picking one engine out of the bunch as an example. This one engine would typically average a gallon an hour. Sometimes a tad under, often dead on, and occasionally as high as 1.2 - 1.25 gallons per hour under hard use. This same dang engine now can't seem to get better than 1.33 gallons per hour EVER. Meaning I might get 5 hours now out of a 7 gallon tank. 5 hours and 15 minutes at best. Before I was getting 7 hours out of 7 gallons... 6 hours minimum doing the worst.