Vanites,

My engine uses a qt of oil every 800 miles, acts like the rings never
seated.

I got a rebuilt 2.1 from a reputable rebuilder.  Ran it around town, no full
throttle for 1000 miles then had the valves readjusted.  Ran it around town
for another 100 miles then took it cross country, 8000 miles in 23 days.
Changed oil every 3000 miles, Castrol 20-50 and Mann filters.

Per the rebuilder's suggestion I ran straight 30 wt for the last 3000 miles,
still uses a quart every 800 miles.  Now he suggests using non detergent 40
wt. Which I'm doing.

Any other ideas out there on how to get the rings to seat?

Mike