I'll chime in on this one. Since I've owned my truck it's only gone long distance one time, from Wyoming to Florida. After a 500 mile break in period I've stayed at 65mph for the most part, 70 occasionally when passing. At 65mph it runs at 1900 rpm, I have 3.55 gearing. Anything faster and fuel economy plummets beside it getting obnoxiously loud. I read some guys on here talking about running their engines to redline, by the sound of mine, I think it would detonate before it ever made it that far, beside the fact that it seems to have no appreciable gain in power after 2500 rpm. I've pulled trailers a couple of times, nothing more than maybe 8k pounds, and truth be told, it runs like a Cadillac when it has a load. Mostly I just use it as my daily driver going back and forth to work, about 75 miles per day, I use the back roads to try to avoid traffic as much as possible. The interstates here in Florida have 75mph speed limits so I try to avoid those, I know I'll **** people off by only going 65 and most people anymore drive like complete morons. I know some of you guys out there in the northwest frozen tundra have speed limits of 80 or more on your interstates, I'll take my motorcycles that fast (or more) but not this old truck.