Recently Ford and before that Honda Civic had to lower their hybrid MPG ratings and compensate customers for the underperformance of their cars based on advertised EPA mpg ratings.. The Lincoln MKZ hybrid underperformed by 7 mpg and the Ford Fusion hybrid by 5 mpg. According to Consumer Reports tests the Jetta hybrid underperforms by 8 mpg. The average underperformance of 17 owners as reported on fueleconomy.gov is 6 mpg. When I first bought my 2013 Jetta hybrid it also underperformed with respect to gas milage. After learning better how to drive it and with careful driving I was able to consistently meet the 45 mpg combined driving rating . That is until the safety recall which I had performed at 8630 miles. The recall changed the transmission synthetic fluid to a mineral based fluid and reprogramed the transmission control software. Since then I have not been able to ever achieve the 45 mpg average again even with the same or even more careful driving protocol. 41 to 42 mpg average is the best I can do. I took it to the dealer at 14,961miles. They tested the car and recorded and documented a combined driving mpg of 36.2, even worse than mine. A VW corporate troubleshooter then had the car tested on the interstate at a steady 70 mph for 55 miles and recorded and documented 46.1 mpg. He then declared there was nothing wrong with the car and that it was within specifications. However, that was a highway only driving test and did not indicate the overall mpg performance of the car. Based on my own tests I believe the car underperforms by 3 to 4 mpg combined driving. My complaint is that the car I bought is not the same car I drive now due to the recall modifications and that as a result of that I am being penalized with lower gas milage. I solicit feedback as to what you think about this situation and if you think there should be compensation. Thanks.