Maybe you can give me some insight into why my 2011 3.6r sometimes displays the low oil level indicator at start up. I had the oil changed last October at a Subaru dealer. They put in synthetic (what kind I have no idea). Since it's gotten colder, I get this indicator some mornings. It will stay on until the next restart. The oil level is full.

I never had this issue last winter, and I was running regular oil. Could this be the oil they used, the filter, or both? Something else?

I'm getting AMSoil and filter this week and will change that out 3 months early.