Bad gas mileage these past two weeks? - AudiWorld Forums

Go Back   AudiWorld Forums > Audi Models > Audi A6 / S6 / RS 6 > A6 / S6 (C6 Platform) Discussion
Log In 


A6 / S6 (C6 Platform) Discussion Discussion forum for the C6 Audi A6 produced from 2004-present and Audi S6 produced from 2007-present

Bad gas mileage these past two weeks?

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-10-2014, 01:33 PM   #1
Audiworld Junior Member
 
Join Date: Feb 2012
Posts: 33
Default Bad gas mileage these past two weeks?

I have a 2009 Audi A6 Avant with the 3.0T engine. In Boston, I used to get 11-13mpg in the city and 26-27 on the highway. Now I'm getting 8-9 city and 23-24 highway. Any ideas what could be wrong? I am having my spark plugs changed next week. I have 80k miles on the car. I'm a bit worried...

Thanks!
unref is offline   Reply With Quote
Old 01-10-2014, 06:36 PM   #2
AudiWorld Senior Member
 
Join Date: Jun 2006
Posts: 1,199
Default

It has been really cold and you have been driving on snow covered roads. That makes a difference
SchwarzS6 is offline   Reply With Quote
Old 01-10-2014, 08:54 PM   #3
AudiWorld Super User
 
raj99's Avatar
 
Join Date: Jul 2007
Posts: 2,580
Default

Also when was the last time you replaced that fuel filter? Plus will make a difference no doubt. And consider the maf as a tertiary possible root
raj99 is offline   Reply With Quote
Old 01-24-2014, 04:27 PM   #4
Audiworld Junior Member
 
Join Date: Feb 2012
Posts: 33
Default

Still getting terrible gas mileage... haven't gotten about 21 mpg on the highway, as before I was getting 25-26mpg. and it's been warm these past few weeks (sans the last three days)...

i haven't replaced the fuel filter. is that the same thing as the air filter? should i replace both?

what is a MAF?

thanks!

EDIT: It looks like I may have changed the fuel filter about a year ago. Should I replace it again?
unref is offline   Reply With Quote
Old 01-24-2014, 06:27 PM   #5
AudiWorld Member
 
haloguy628's Avatar
 
Join Date: Feb 2010
Location: Castle Pines CO
Posts: 269
Default

Quote:
Originally Posted by unref View Post
Still getting terrible gas mileage... haven't gotten about 21 mpg on the highway, as before I was getting 25-26mpg. and it's been warm these past few weeks (sans the last three days)...

i haven't replaced the fuel filter. is that the same thing as the air filter? should i replace both?

what is a MAF?

thanks!

EDIT: It looks like I may have changed the fuel filter about a year ago. Should I replace it again?
No if the fuel filter was replaced one year ago.

As for your increased fuel consumption. Check all your vacuum hoses for leaks. Vacuum hoses become brittle with time and constant exposure to the engine heat. Then in really cold weather the hose breaks.
haloguy628 is offline   Reply With Quote
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Audi 2.0T OIL CONSUMPTION FIXED!!! c6vetteman 2.0T FSI Discussion 15 01-22-2016 10:02 PM
APR Tune Net Nannies stay away dougpaper A6 (C7 Platform) Discussion 9 09-28-2015 01:47 PM
Audi Other 2013 Audi RS5 (low mileage) $61,000 buiyahkah Vehicles For Sale 0 09-07-2015 09:29 AM
Mechatronic and Sport Differential issues wjhpilot S4 (B8 Platform) Discussion 0 09-04-2015 01:43 PM
2004 A8L 4.2 Gas Flap Sticker zjw8407 A8 / S8 (D3 Platform) Discussion 5 09-02-2015 05:20 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 01:44 PM.