2001 1.9 TDI. Got the oil changed twice in the last two month (This is normal as I drive a lot). I’m noticing that the oil seems to be disappearing though. Doesn’t seem to be burning it as I don’t see white smoke from exhaust. Also I haven’t noticed any oil in driveways or where I park. I’ve added 2 quarts twice just this week. Where could it be going?