I seem to be on a losing streak lately. I was adjusting my rack dampener in the driveway last night and listening to some other noises and so the car was idling for 15 minutes or so(I should add that this was after a 30 mile drive home from work, so the engine was already up to temp). The longer it idled the more smoke seemed to come from the exhaust and when I pressed the accelerator a pretty good amount of greyish-blue smoke came out. I took it for a little spin and came back and checked the oil and I was down at least a half-quart from before I started the idle! Prior to this I have used about a quart every 3K. The strange thing is, the smoke didn't really smell like burning oil. I let it sit for about 30 minutes and took it for a 6 mile ride (after adding oil) and everything seemed to be normal(I didn't let it idle first). Normally I have to let the car idle in the driveway in the morning for about 5 minutes or so (VERY steep driveway) to have enough power to get out and I notice a puff of smoke when I leave. No smoke any other time, so idling seems to be the big determining factor. Could bad turbo seals allow oil into the turbo at idle but not as much under load? In the last six months I have had new GP's, rebuilt injectors, valves adjusted, new tank screen and fuel lines and a lot more that isn't relevant to this problem. The car has 89,000 on the odometer (I bought it at 84K). Any ideas? '85 300SD. Thanks.