Originally Posted By: Benzadmiral
Originally Posted By: nickaluch
I remember Benzadmirial on this forum had a Buick regal with the same ecotec motor using QSUD and it was consuming oil like crazy. Interesting
It did. I went back to the dealer AC Delco 5W-30, and seemed to have no trouble. The next change, this one I'm on now, was also dealer oil (though they said they use full synth now), and I've lost 1.5 quarts in 2400 miles. Same driving as before, 70% city, hardly a difference in any conditions. No visible leaks.
Two quarts of oil to top off in 5000 miles isn't going to break me. But it is puzzling.
PCV?