Join Date: Nov 2007
Location: Humboldt County, CA
Car: 2008 OB XT Limited; 2002 Impreza 2.5TS
Feedback Score: 0 reviews
Blackstone vs. Wix UOA (Used Oil Analysis)
I've posted the Blackstone UOAs from my cars here, but here's something different.
I just bought a bunch of Wix UOAs from Amazon for less than $11 each.
I wanted to see how the Wix UOA would compare to the Blackstone UOAs, so I sent a sample from my last oil change to both. I took both samples at the same time, and even poured oil back and forth between the two containers so that each lab received the exact same oil.
The differences are large, but at least they're pretty consistent.
One surprise: I had understood that Blackstone's total base numbers (TBN) tended to be different, but their number is about the same as Wix's.
Regarding timing, it took Blackstone about 2 weeks to e-mail me my results, and it took Wix 3 weeks to send me the results by snail mail. Blackstone's website is better. Wix's website is buggy, and I haven't been able to access my results on-line at all.