I do 3-4 hour drives every weekend on the AUTOBAHN!!! 2500RPM is nothin'! I like to cruise at 120 which is a comfortable 2600RPM in the Corvette (gotta love .5:1 6th gear w/ 3.42 rears), but nearly flat out in the 318i at about 5500-6000RPM. Takes it like a champ. I've put over 120k km on my 318 in the 3.5 years I've been doing this. ps. by the way, if I'm right about the tire you're running, your tach is off - kinda normal if you're running a stocker. 25.6" OD tire with a .675:1 5th gear, and 3.55:1 rear end should be doing right at 2200 rpm at 70mph. A 25.6" OD tire would be consistent with a 225/60/15, a 245/50/16, or a 275/40/17. It would take a VERY small 23.5" tire for that gearing to get up to 2400 RPM. Honestly, I probably wouldn't do it in a daily driver, anymore. I've grown too used to lugging along where the engine is barely audible and getting 30+ mpg. It's pretty nice. It's what has me really wanting a .5:1 OD. Then I can keep the gears and have my fuel mileage, too. Here's kind of a cool fact I just uncovered. The final drive ratio of a 2.73 rear with a T5 (.675:1 OD) is almost identical to a 3.73 with a T56 (.5:1 OD).