I had Blackstone re-test my sample for TBN. The 2nd analysis read 7.8 TBN!!!
I got a great deal on a case of Schaeffer's that I couldn't pass up. Didn't know how good the T6 was until after I dumped it.
I am very impressed with my truck and OCI. I am very confident that I broken her in properly when I 1st got it. I towed several trailers between 5-10k miles. And made 2 long hauls with my boat to the east coast at around 15k miles.
I'm not surprised at all about the TBN. I think in many cases (like a pickup truck without EGR) that T6 can take an oci to the condemnation point in wear metals before it runs low in TBN.
That's a short oci but it does look as though maybe the truck hit a bump and some emissions stuff fell off.