I learned a valuable lesson in tire pressure today, after almost losing control of my truck. Let some air out when you anticipate traveling over bumpy roads. I hit a bad spot in the road at about 42 mph (speed limit 50) and realized that the "washboarding" effect that bumps can have on pickups was greatly magnified by having the tires up at max (50 psi vs 26 psi recommended). Fortunately I caught it and kept it from skidding, but the thought of "what if that had been above 60 on the interstate" came to mind. So I'm going to play with tire pressures a bit on my Nissan, to find a good balance between FE and safety, because max on this truck is not safe. I let them down to 36 psi hot for a noticeable difference in handling and pickup. Nonetheless, I still got over 24 mpg on the trip, with a ton of hills. DWL up the hills and NICE-On down the hills.