I have a 2006 A3 2.0T MT and my mileage has been declining recently. The car has only 32K miles and no change has been noted in power, idle, engine smoothness, etc. and my driving style is unchanged. Yet, my rural (mostly 35 mph roads) mileage has gone from 23-24 mpg to about 20.5 mpg. Tires were replaced last summer with Goodyear Eagle Sport All Season in OEM size. Ideas? Spark plugs, computer sensor, normal fluctuation??
Thanks.