Just got back from my first Colorado camping trip with the Metris. Towed a travel trailer that weighted just under 3000lbs and had less the 1000 lbs in the van total weight along the I-70 mountain corridor.
On the flats it seemed to like 65 to 70 mph at 2200-2400rpm with power left over. On most of the climbs I cruised at 55 to 60 around 2800rpm but forgot to check what gear the van was using. I had more power if I wanted to push the rpm's but was happy with that speed.
On the dreaded Esinerhower Tunnel hill (for those who don't know it checkout the Ike Gauntlet on Fast Lane Truck) it was pulling around 3000rpm at 55mph without much problem and I had enough power that if I slowed to 40 behind the ever present semi-trucks I could still pass them and work back up to 60+ mph.
The two surprises I had were first, going down hill, when the van is empty it runs down hills like a run away freight train. But with the camper it stayed around 60-65mph down the steepest hills, intelligent transmission?
Second was fuel mileage, on a 250 mile trip I averaged 12.9 mpg out and 13.5 on the way back. I average over 25 most of the time with gear in back. All in all I have been very impressed with the van. Now if it proves to be trouble free for the next 100,000+ Miles I will be a happy camper.