Just a thought. Doesn't your low level oil lamp light up on the dashboard? Seems it would give an indication with a little more warning than being almost off the stick!.

FWIW, my 88CE slowly started burnng oil until it got to using a quart every 500 miles or so. On a regularly scheduled service interval (45,000) back in '03I was asked if I was burning oil. And I was, but not yet to the point of 1/500mi. The tech had checked the plugs as part of the service and noticed some fouling. (see previous post.)

Good news. Replaced the valve seals. ( see previous posts as a likely culprit). Problem solved. Never see the oil lamp bewteen changes now.

Indy price was $400.00 or so, alomst all labor. Seals were less than $40.00 IIRC.