Yes, changed it to synthetic.

This was my "company" car before I bought it personally.

When the company owner purchased the car, he also purchased oil change package from the dealership.
I'm pretty certain that those oil changes were not with synthetic oil. When the oil change package expired, he took the car to Jiffy Lube. I have paperwork showing that at least the one previous oil change at Jiffy Lube was with regular oil.

When I personally took car to Jiffy Lube (still owned by company) they told me that their computer showed changes with synthetic, so that is what I had done at that oil change. That is when oil light came on.

I since have purchased the car from company with this problem and would like to have it corrected for peace of mind.

Also, wondering if the changing back and forth of oil has caused a problem?