2005 A6 Poor Fuel Economy
#1
2005 A6 Poor Fuel Economy
Greetings,
I am enthralled with my 2005 A6, but have an issue I hope to get insight on. When I purchased my A6 I was seeing about 11 MPG. My last 2 fill ups I been seeing a little over 8.5 MPG of premium fuel only. this is poor even by Luxo V8 standards. I have been tracking the fuel economy with an app I installed on my phone, so I have a steady fuel economy track record. I live in Chicago. I am not a lead footed driver. I doubt that a winter blend of gas would cause such a poor fuel economy showing. My drive has been almost exclusively local/city driving. Are there any issues or quirks specific to 4.2L V8 Audi's that is a major factor for the poor fuel economy? I expected a less than stellar fuel economy, but the poor fuel economy is exceeding my expectations. Any helpful insight, views, and suggestions will be deeply appreciated.
I am enthralled with my 2005 A6, but have an issue I hope to get insight on. When I purchased my A6 I was seeing about 11 MPG. My last 2 fill ups I been seeing a little over 8.5 MPG of premium fuel only. this is poor even by Luxo V8 standards. I have been tracking the fuel economy with an app I installed on my phone, so I have a steady fuel economy track record. I live in Chicago. I am not a lead footed driver. I doubt that a winter blend of gas would cause such a poor fuel economy showing. My drive has been almost exclusively local/city driving. Are there any issues or quirks specific to 4.2L V8 Audi's that is a major factor for the poor fuel economy? I expected a less than stellar fuel economy, but the poor fuel economy is exceeding my expectations. Any helpful insight, views, and suggestions will be deeply appreciated.
#3
Greetings,
I only had my car for about 6 Months. I don't seem to be losing oil. I did a little research and the general consensus seem to be with the O2 and/or Mass Air Flow (MAF) sensors. I will look into this. Thank your for your response and suggestion.
#4
I suggest running a scan to look at the fuel trims and sensor readings. This will tell you a lot about whats happening. This car should get around 16-18 in town. I have been surprised by the poor fuel economy of the Audis. My 05 XJ8 gets 24 in town with its 300 hp V8.
#7
Follow up,
I checked my engine air filter. To sum it up IT WAS FILTHY!!! Dirt was falling off with just a light tap. I replaced it with a new air filter. I have not checked the fuel economy since replacing the filter, but the indications are looking promising. I am certain that the air filter was a main factor with my issue. I will keep you all apprised of my results. Thank you all for our suggestions to date. I also created a procedure for changing the engine air filter for my model year and engine size, seeing that I could not find a procedure that closely matched the procedure for my model year.
I checked my engine air filter. To sum it up IT WAS FILTHY!!! Dirt was falling off with just a light tap. I replaced it with a new air filter. I have not checked the fuel economy since replacing the filter, but the indications are looking promising. I am certain that the air filter was a main factor with my issue. I will keep you all apprised of my results. Thank you all for our suggestions to date. I also created a procedure for changing the engine air filter for my model year and engine size, seeing that I could not find a procedure that closely matched the procedure for my model year.
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04-16-2012 01:59 AM