I took my 2013 Audi A3 TDI with 45,000 miles to dealer based on a recall notice for ECM software upgrade. Was told it was a standard software upgrade. Mileage before was a consistent 38mpg. Came back at 32 mpg over the next 2,500miles. Dealer said nothing is wrong with it and it is within norm. I was also told this was not the current diesel scandal fix yet my mileage is now down, and would go down even further when the fix comes out? Not why I bought this diesel TDI. Have others had this problem? Not sure if it's my car or happening to others. Any insights would be appreciated.