You have to burn an awful lot of oil to see it smoke, way more than 1000 miles a quart. My 190 used a little more that your's did, I changed the valve guide seals but it didn't change it. I switched to a higher viscosity oil (20w50) that dropped the oil consumption and based on normal oil consumption stopped worring about it. I was just anoyed that I had a Peugeot diesel with 266,000 miles on it that used a fraction of that.
5 speed '91 190E 2.6 320,000 mi. (new car, fast, smooth as silk six, couldn't find any more Peugeots)
5 speed '85 Peugeot 505 2.5l Turbo Diesel 266,000 mi. (old car, fast for a diesel, had 2 others)
5 speed '01 Jetta V6 (new wifes car, pretty quick)
5 speed '85 Peugeot 505 2.2l Turbo Gas 197,000 mi. (wifes car, faster, sadly gone just short of 200k )
5 speed '83 Yamaha 750 Maxim 14,000 mi. (fastest)
0 speed 4' x 8' 1800 lb Harbor Freight utility trailer (only as fast as what's pulling it)