What I think is you need to top it off and watch it. I have 5k miles on some M1 0w30 in A mitsubishi Outlander that has experience colder weather and highway speeds this run. I have been adding an ounce of LC every 1k miles and actually have been happy with it maintaining the oil level. with this engines tyraditiponal usage. I did add about 6 oz of top up oil last week but that parralles the use I had with the Thicker Maxlife syn during the last interval. Where I added 6 oz at 4k into the interval to keep the oil level at the top line.
Yours also may stop using or it may just like consuming this oil but as long as you top it off I don't see a problem with a little consumptyion.. I hope it slows down for you thouugh, a half quart in only 1500 miles would get my attention. My(now sold) Toyota Tacoma(3.4) engine did the same thing on this oil in the first 1k it used half a quart then it stopped using it. for the remainder of the interval.
If you don't like the oil let me know where you got it because I like the way it runs in my rides.