Well, lets see. The 220D uses about a quart a day (hehe, really about 4 quarts to a tank of fuel -- currently not running due to chain stretch and bad brakes, etc).

The Volvo, when running (blown head gasket) uses a quart per 1000 miles, more or less. I anticipate less when I get a new head gasket (or whatever else) in it.

The 280 used to use quite a bit, but new valve cover gaskets seem to have reduced the consumption to about a quart in 2000 miles or less -- haven't added any since I changed the oil in July.

The 300D (not an old benz) doesn't use more than a quart in 8000 miles -- changed it when it got low enough to turn the oil level light on.

Mobil 1 in everything except the 220D.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!