Quart in 1500 is not major oil use in my books...
I wonder if changing type of oil may not help.. I would think about using a diesel grade oil.. Lots of them are for all fleet use.. Meaning you can use them in gas or diesel engines.. Often those will clean the rings and slow the oil use.. The one I use for that is Chevron Delo 400.. an all fleet gas or diesel oil in the 15-40 grade.. It does a great job of cleaning engines inside.. I would change the filter in about half normal time the first time and see how it looks and make a couple oil and filter changes at 3000 miles.. see if that helps.. Not to much to invest if you figure the cost of doing other work..