Wow, that Rotella is shot from the fuel! Did you take the sample or someone else? I don't think that I have ever seen a Blackstone fuel % that high and my trips are 7 miles each way.
Was the car fully warmed up? Did you do some WOT runs before taking the sample? If you want to really get to the root of the problem, and want a more accurate fuel reading, you'll need to spend more than $30 on a uoa.