Originally Posted by swartzentruber
For all those that think driving at 1500rpm is really bad and/or will hurt your engine, I've noticed in D3 (DCT), it's will shift into 7 at a steady speed ~50mph/no accel, which I've noticed is around 1500rpm (or certainly less than 2k, IIRC). If driving at that RPM was that bad, I don't think M would have allowed the DCT to be programmed that way (unless low RPM in higher gears is better than low RPM in low gears). This is actually one reason I don't like the D modes that much. D3 is too granny, D4 is a bit too aggressive for everyday driving.
I always coast at 1,500 RPM in the city 6th gear 40-50mph
I know it has a lack of torque but its not bad either
Some say coasting at 2,500 RPM saves more gas because it has less stress on the engine but I don't know