Well 1st I took my truck on an 800 mile trip on the Alaskan highway. Fuel mileage as about what I expected. 14.5 mpg when driving through the mountains unloaded at 55-65mph. On flat highways I was hitting just over 17 mpg at 65 mph. All was hand calculated, the overhead was reading a consistent 1 mpg higher than those numbers. Once I got back I got a P2262 code, cleared it out and it hasn't came back. Is this anything I should be worried about? Oh and the change oil light came on at only 2100 miles. That can't be right, I haven't towed much yet, and I don't do much city driving. Stupid idiot lights!