1/2 quart to 3 tanks of fuel, works out to what, about 1 quart in 1200-1500 miles??? Not bad actually. And I'm betting you are trying to keep the oil level exactly at the full line, correct?? Next time the level falls off the full mark, let it ride and see if the consumption continues. You might just find that about the time the level gets halfway between the marks oil usage will stop.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.