That is great...I drove to North Carolina last weekend behind a uhaul trailer, around 70mph with periods of higher speed 80ish, and averaged 36mpg with the AC on, I can say I'm quite happy with that. The periods of higher speed kinda ruined it, for a while after refueling and 70mph I saw an average of 41-42mpg for a time. Oh and this was also fully loaded down probably to payload capacity, I was very impressed.
I suspect 87 octane?
I test drove one today. Has many of the Arteon goodies too.