Mohawk, It could just be because of the oil switching and residual cleaner. See if it levels out. It should. Don't waste your cash on synthetics if usage continues. No sense in wasting $ oil. If usage continues, go with a thicker 40wt oil. 15w-40 is cheap and easy to get.
Marcre, synthetics are awesome if you don't like changing oil every 3-5K miles. I can't stop 'experimenting' with mine
. I'm currently running shell rotella-t 5w-40. She lights off in the morning @ close to 0degF with the same force she did on 5w-20 or 5w-30. I'm only at 43Kmi, but it's never really burned any oil. It might use 1qt in 3-4Kmi. I'd like to stick with 5K OCI's.
Joel