Recently got a 2001 325i 5 spoeed with 41,000 miles. I'm still getting used to the very responsive steering, and the sweet sound of the 6 cyl. engine revving up through the gears. Cruising at 70 mph on the freeways the engine is at 3000 rpm. This seems kind of excessive, but I figure this is normal for this engine. The tires are Michelin Pilot 205-55/16. Is this a satisfactory rpm for this speed?