I let my turbo 240 warm up while I was wiping off the windows this morning. The car had been idling about 5 minuets when I got to the rear window and noticed a fair size ring of soot around the downturned tip of my exhaust. I recently turned up the ALDA, but I don't get much smoke when accelerating. The engine runs great and has not used a drop of oil in the 1000 or so miles that I have driven it. What’s the deal?

__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine