The Ironman I recently aquired is a real thirsty girl...as in: almost a quart per hundred miles...

When I get a chance, my plan is a couple quarts of Rotella + a pint of Seafoam in the crank case for 1-2C before the next oil change.

Then go through the PCV system & treat her to a new PCV valve. (looks like the orig still in there...with 152K on the clock)