And that 29mpg will only get better over time. I had pretty much the same engine in my 2011 Touareg, which was EPA rated at 28 highway. That number increased regularly with use. By the time I traded it (@17,000 miles) it was up to 33 mpg. The engine in my Cayenne is one generation newer, as is the transmission. So I fully expect even better economy out of the Porsche. I'm told that this constant mpg improvement goes on until approx 35k miles, at which time the engine is nicely broken in.