I was at the local car parts store (Advance Auto) and see they carry MC Full Synth. I picked up 6 qts. & a PureOne filter for my next OC. I thought $4.99 a qt. is a nice price for full synth. I was putting it away when returning home and noticed the back of the lable reads... "Product of Korea" followed by "Blended and Bottled in the USA". Am I wrong or is that a bit unusual? Also is this stuff OK oil?