That is a very good number especially since you probably don't have too many miles yet. What tire psi are you using? DSG or manual? Normally road trips include some cargo or passengers or have more traffic so that would be a good number.
I now have a total of 1300 miles on my TDI after the 500 mile trip. I am using stock settings (35 psi) for my 17" Avignons, it is a six-speed manual trans, and I was the only passenger with one full suitcase in the trunk. Speed limits ranged anywhere from 55 - 70 MPH; however, I had the cruise set on 65 MPH for the majority of the trip.
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