05 passat GLS TDI BHW Pd Auto 17" tires. My Trip last week fron Denver to Yakima Wa. Winds around 20 mph. I trying to hold 80 mph, ac on. The trip was 1140 mile, my math put came in at 36 mpg. The the car was 35 mpg but the the speedometer reads 3 mile an hour fast.
I was not babysitting the...