Gas mileage
08-13-2008, 08:45 AM
#51
Audi Forum - Posts like an A3
Join Date: Jul 2008
Location: Montreal
Posts: 92
Re: Gas mileage
I was getting very bad fuel economy like you (350-400 km) until my front oxygen sensor died completely. seems it was dying a slow death and not working right for a long time before any noticeable symptoms showed up, i guess the ECU made valiant efforts to compensate but that must have resulted in an over-rich mixture. Since changing the O2 sensor, i've suddenly been getting 600-650 km on a tank, and i drive aggressively in the city + short hwy trips mostly. Got a long road trip coming up soon, i cant wait to see what kind of HWY only mileage i get while driving for max economy.
I read somewhere that Audi recommends changing the O2 sensors every 2 years, i guess there's a good reason for that. I saved enough on fuel after 4-5 fill ups to pay for the $130 O2 sensor.
I read somewhere that Audi recommends changing the O2 sensors every 2 years, i guess there's a good reason for that. I saved enough on fuel after 4-5 fill ups to pay for the $130 O2 sensor.
Last edited by frob; 08-13-2008 at 08:48 AM.
08-13-2008, 09:57 AM
#52
Audi Forum - Posts like an RS4
Join Date: Aug 2007
Location: Etobicoke
Posts: 864
Re: Gas mileage
I was getting very bad fuel economy like you (350-400 km) until my front oxygen sensor died completely. seems it was dying a slow death and not working right for a long time before any noticeable symptoms showed up, i guess the ECU made valiant efforts to compensate but that must have resulted in an over-rich mixture. Since changing the O2 sensor, i've suddenly been getting 600-650 km on a tank, and i drive aggressively in the city + short hwy trips mostly. Got a long road trip coming up soon, i cant wait to see what kind of HWY only mileage i get while driving for max economy.
I read somewhere that Audi recommends changing the O2 sensors every 2 years, i guess there's a good reason for that. I saved enough on fuel after 4-5 fill ups to pay for the $130 O2 sensor.
I read somewhere that Audi recommends changing the O2 sensors every 2 years, i guess there's a good reason for that. I saved enough on fuel after 4-5 fill ups to pay for the $130 O2 sensor.
08-13-2008, 04:21 PM
#54
Audi Forum - Posts like an A1
Join Date: Aug 2008
Location: Toronto
Posts: 12
Re: Gas mileage
I have the 2008 S5 and the tank is 65L, the S4 Tank is 70L.
I am getting 500Km on a full tank and thats with me driving pretty hard. You guys may want to check your O2 sensor and Gas filters.
I am getting 500Km on a full tank and thats with me driving pretty hard. You guys may want to check your O2 sensor and Gas filters.
08-14-2008, 11:15 AM
#55
Audi Forum - Posts like an A3
Join Date: Mar 2008
Location: Toronto
Posts: 84
Re: Gas mileage
2006 A4 2.0T
I averaged 6.7L/100km traveling from Toronto to Algonquin Park with 95% HWY driving on cruise control. I only did 5km over posted speed limit at all times. My cruise range was around 800KM without running it bone dry. Mind you there was no traffic delays, just smooth cruising.
I averaged 6.7L/100km traveling from Toronto to Algonquin Park with 95% HWY driving on cruise control. I only did 5km over posted speed limit at all times. My cruise range was around 800KM without running it bone dry. Mind you there was no traffic delays, just smooth cruising.
Last edited by airborneriflema; 08-14-2008 at 11:25 AM.
09-02-2008, 09:16 PM
#57
Audi Forum - Posts like an A1
Join Date: Sep 2008
Location: The Wack
Posts: 20
Re: Gas mileage
Well its good to see that I'm not the only one getting 350km on a tank. I've had my car for a year and half, just thinking that the quattro system made it thirsty.
No codes are being pulled, no fuel leaks, and always run good gas.
I love the car and was recently in a debate about getting rid of her partly because of poor mpg.
Definetly going to price out the O2 before the cat, and get that fuel filter replaced.
No codes are being pulled, no fuel leaks, and always run good gas.
I love the car and was recently in a debate about getting rid of her partly because of poor mpg.
Definetly going to price out the O2 before the cat, and get that fuel filter replaced.
09-02-2008, 10:42 PM
#58
Audi Forum - Posts like an A4
Join Date: Apr 2008
Location: mississauga
Posts: 195
Re: Gas mileage
I'm getting about 10L/100km with 60% hwy....it seems like it's good cuz the city is the killer with the 3.0...I try not to go over 110 on the hwy...but it's hard driving an audi @ that speed...the odd time I'll push going 140-150..I think that's the best speed for it 
09-03-2008, 12:20 AM
#59
Audi Forum - Posts like an A1
Join Date: Aug 2008
Location: Etobicoke
Posts: 18
Re: Gas mileage
2006 A4 2.0T
I averaged 6.7L/100km traveling from Toronto to Algonquin Park with 95% HWY driving on cruise control. I only did 5km over posted speed limit at all times. My cruise range was around 800KM without running it bone dry. Mind you there was no traffic delays, just smooth cruising.
I averaged 6.7L/100km traveling from Toronto to Algonquin Park with 95% HWY driving on cruise control. I only did 5km over posted speed limit at all times. My cruise range was around 800KM without running it bone dry. Mind you there was no traffic delays, just smooth cruising.
09-15-2008, 10:34 PM
#60
Audi Forum - Posts like an A1
Join Date: Aug 2008
Location: Montreal
Posts: 3
Re: Gas mileage
I have a 1998 Audi A4 2.8 Quatro and i only get about 400kms city and maybe 450 with 75% highway. And also i am having troubles with my gas gage. Its very inaccurate. When i fill it up it it says its full but it quickly runs down to empty after only 300 km and then i drive it for another 100 km while on empty before filling it up again. Anyone else have this problem.
