Same thing basically. 1997 FZJ 80, 180000+ miles, I never calibrated the odometer to the 315's. About 1 quart every 3000 miles.
If I remember correctly, the owners manual states the oil level should be checked each time the Cruiser is filled with gas? Playing it safe I guess, not that I check it that often. I also seem to recall that the 1FZ is designed to burn some amount of oil.
I do run Castrol 20W50 and change it every 5000 miles. I used to run Mobil 1 5W30 or 10W30. But for some reasons I've always had the impression my Cruisers run better on Castrol. Plus the 20W50 makes me feel better about running higher than usual RPM's on occasion in the mud.