How much does a UOA from blackstone cost? Edit: Google tells me $25.
I got billed for conventional oil at my last dealer change (2nd change, 7500 miles)--I called to complain and the service rep confirmed with the tech who did the change that he used full subaru synthetic. Apparently it was just a billing error (in my favor), but I'm now curious to see if they were telling the truth. Would be a good time to check out the oil performance as well at my 10,250 change. I assume they will be able to determine if it's synthetic or not?