Ooh ooh, I know, I would recommend the thickest heavy duty oil you can find, like a 20w50 or a straight 60 weight. Using 90w diff lube with finely ground fir sawdust might even be better. You're gonna want handfuls of viscosity index improvers in every quart with enough detergent to to run a month's worth of laundry through your crankcase. /sarcastic buzzard remarks
Merkava -
More than likely you've generated a small amount varnish and carbon on the piston rings. If you could find a way to make some long distance airborne jumps like the Dukes of Hazzard used to do in the ole General Lee, you could probably knock most of it loose in a few jumps. //sarcastic buzzard remarks
Alright, add a cleaner like MMO or Rislone or LC20 or Archoil or ZMax or Kreen (or ?) for the last 1 - 2k miles of your OCI then resume your normal high mileage oil machinations. If you're lucky you'll get the consumtion down to 1 quart every 3000 miles. You might even be bold enough to try Redline with an AutoRX chaser, but I'm not holding my breath on account of them there high prices. /dang it