@TOLSON They state it's "Full Synthetic" in this VOA (link below) but then the Blackstone report says "Blend". I do know Mobil did label, at least, their 10w-30 as a Synthetic Blend at one time. TBN of 8.5 is the corrected result. Notice the add pack is lower than yours here.
Your Silicon is half of what is posted here. This could just be lab variance. but the consistancy on the rest of the add pack makes me think this is a change on the latest oil. May I ask what oil you ran before this run?
Delvac VOA
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Thanks! If it was the black bottle Delvac 1300 previously then that adds more evidence that this gray bottle extreme has had a recent additive boost. Since there is 44% LESS anti-wear additives in the 1300.Unsure as it was a shop change before this but it’s safe to assume it was likely black bottle/bucket Delvac. Most every shop seems to use that as it’s cheapest for them.
Mobil sets their "Advanced Full Synthetic" wording to their Delvac 1 product line & not this Delvac product. It says Synthetic on the jugs. All that being said it does appear to be a good offering & with the $30 rebate I got back I can't complain. When I run it I'll post up the UOA to see if they did beef up the add pack on it since the time you've tested it. Thanks by the way!The sample "Fantastic" posted was the Full Synthetic Mobil Extreme 15/40. I sent it in as a virgin sample before the oil was on the consumer map. I liked that oil a lot. That oil in the bottle smelled like a Manhattan on the rocks.