I still haven't gotten around to checking what size the idle jets are. I kinda pushed it aside since i got the truck running at about 26mpgs now. Interesting that you guys say it has bigger jets than what it needs. That would explain a few things. Doing anything over 70mph on the freeway and my mileage drops alot. Fast acceleration in the lower gears and it drops as well. Also it feels like the truck has no real power passed like 50% throttle and my best guess would be around 3krpm(no tach). Oil also still shows signs of fuel contamination. I'll have to give weber a call sometime next week and order some more appropriately sized jets.