Class C Gas Mileage

My first tank was 6.2 - then I slowed down to 65 or less. My second tank was 7.6. I bought a Scangauge to monitor real time. That helped alot. I was around 8.5 on my run that day(60 miles) before I filled up(above second tank). Now that was the Scangauge telling me that and not actual but I suspect it's close enough to understand how to influence the mileage. The last leg to my dealer across Houston was around 9.8...and I was less than 60 and more like 55 due to traffic.

Some observations....smooth interstate roads perform better than the 2-lanes; finding an 18 wheeler to hide behind creates some interesting drafts - smooth and seems to pull you along....mpg increases here too.