Ah, Prof...you misconstrued the endearments.
It is simply that your highway and 'mixed' both sounded spectacularly high, based on many of us having read the near monthly new thread of "what is your mpg" that come up here continually. Thus, your data seemed to be an anomaly. Diesel: yes. V8 gas, hard to believe.
Look forward to future reports. I love chocolate, esp dark chocolate, and we had a great time at H Park with our granddaughter.
GL, Ol'UncleMotor