Bart, why are you pouring unnecessarily-expensive synthetic oil into your engine if you're just burning it up long before it can do your engine any good? Do you use nice fresh $20 bills to wipe the bugs off your windshield, too? Save yourself some money and switch back to dino-juice.
If you are burning oil - how often do you rev your engine over 4.5-5k rpm? If oil is burning up by getting past the piston rings (the most common way) then it will get past them much, much faster at high rpm. That might be one way to help control it. Try some more seafoam oil treatments, too. I'm making it a point to do so once a year on both cars.