1999.5 A4 1.8TQM Fuel Economy

Here are some facts regarding the fuel consumption I've experienced with my car:

Driving Time
Average Price
Per Gallon
Fuel Expenses
To Date
20.142 MPG 38.25 MPH 6:50 Hours $1.884 $3058.47

The complete set of data is available in an Excel spreadsheet format.

I always use Premium Unleaded fuel and in California that generally means 91 octane (it used to be 92 but was recently downgraded).  Chevron is my fuel of choice.  I've never had any problems with their fuel even though others in different parts of the country have had poor experiences with them.  If you take a look at the spreadsheet you will find that the large drops in fuel economy correspond with track events or autocross days.