Pardon my newbiness (first post on VWV) but isn't it possible that a misalignment could be responsible for a sudden and noticeable decrease in mileage and a need for new shoes?...I bought four Humho 4x all season tires and had the dealer install them. The dealer asked if I wanted an alignment and I declined thinking it seemed ludicrous a new car would need an alignment. To be honest I was shocked I needed new tires already, but I did have a few backroad blasts that may have contributed to that...
A "few backroad blasts" could conceiveably have done the deed, and you've been paying the price since...
My last two tanks were 26.2 and 26.3
If you do any measure of city driving, you're not going to get 30. I'd suggest you start keeping track on Fuelly (or similar) and see what you're really getting. I think, frankly, that where I am is pretty average.
Take a look at this:
These are my last 5 tank averages.
miles \ gal \ mpg
418 \ 14.549 \ 28.73049694
414.6 \ 13.853 \ 29.92853534
407.5 \ 13.844 \ 29.43513435
417 \ 13.459 \ 30.98298536
441.2 \ 14.213 \ 31.0420038
The low one included a couple of spirited drives down 9 mile road. The most recent includes an "Italian Tuneup". It will be interesting to see if I can maintain the higher average.
On my "Italian Tuneup" I used manual mode 1st gear with moderate excelleration until redline, second to 45 MPH (the speedlimit) and then bumped up to 6th gear as fast as tiptronics would allow.
2010 CSG GTI DSG | APR Stage I ECU | APR/Carbonio Stage I & II Intake | APR RSC Cat-back | AWE T.O.P | Smoked Corner Markers | Koni Coilovers | VCDS