Alright something has to be off. Alot of you are getting better mileage than I am.

I do about 60% highway kms and 40% city kms. I live in White Rock BC and I am usually going up and down hills. I get 500kms to a tank. Maybe 550kms if I push it.

The only reason I can think of is the gas I fill up is 92 Octane and it may contain Ethanol.

 

All gas contains a certain percent of ethanol if im not mistaken, even the premium gas (91 + ) contain atleast 5% ethanol, im not sure if Shell gas uses ethanol in their gas or not, but Husky and some other major providers have, because it lowers emissions. I read all that on various forums and all contain the same or close info:P I could be mistaken thou.

Also no idea why my mileage is so high I only drive highway when im going home for vacation from school lol and when I do, i average 900km(on cluster display) going 120 -130, and when im driving city i average 590-600. But again, thats what the display shows, and im not sure how accurate that is lol, sorry for the long ramble..

 

One last point about gas mileage. I fill up in Blaine, Washington and I use the premium down there. It's 92. Now if the premium gas is not used down there that much it could be 30 days old or more which would affect my mileage. If that's the case I might as well use 87 as it would always be fresh.

 

correct me if i'm wrong, but i read somewhere that if your car needs premium gas, then you better fill it up with premium. if you use say 87, doesn't say that cause detonation? wouldn't that affect your mileage and how efficient your engine performs? running premium doesn't give your car more mileage or it lasts longer.

 

Might be right foot syndrome. For one full tank of gas, reset the average fuel consumption indicator and see if you can do you normal or light driving and keep the long-term average indicator less than say 11 l/100km for the whole tank. Flip into instantaneous mode when you feel like it, and see if you can keep the reading under 20-22 l/100 km when accelerating and between 7-12 l/100km most other times. You'll get a real good feel for your driving style by trying this. Warning - might not be as much fun as you usually have, but that's your tradeoff - full fun or great fuel consumption.

I can get 500-520 km per tank with my manual 3.0 and 580-620km with my manual 2.0T. That's primarily smooth city/highway driving with some fun on the on & off ramps and no full throttle driving which absolutely kills fuel consumption.

 

Ok lets get the gas/octane thing straight here.

Higher octane generally does not equate to better gas mileage. Octane is the pre-detonation properties of gas. Octane itself contains less usable energy than gas in terms of BTUs per gallon. Ethanol is often made up using wheat based products that may have a negative effect on some engine parts.

So here is the theory. If you use fuel with an octane level less than what your car is designed for you may experience uneven or premature detonation which could reduce the overal HP output and may cause engine damage and failure. That leads you to conclude that if you are experiencing pre-detonaton and are not using the full energy capability of the particular fuel you will experience less gas mileage.

I noted above that ethanol contains less energy per gal than gas so if you use a premium fuel that contains less or no ethanol you have more usable energy per gallon and thus experience better gas mileage under the exact conditions.

In short I would recommend using at least 91 octane fuel for the engine type and compression that our engines have. If at all possible use the lowest or no ethanol fuel available.

I us 91 and no higher and most always Shell because of the no ethanol content.

Hope this helps.

 

Sorry guys to bring it back, but... between two fill ups I managed to get around 720km in the city. Everything based on the gas consumption, and the number of kms displayed on the trip console. It is very much like what the manual says: ~10L / 100km.
As I said it before, my Audi is a 2005 B6 1.8T CVT, APR Stage I chipped.

 

I have actually found the problem to my gas mileage a couple days ago.... the car came back from the shop with new alignment done and I guess the tire pressure was very low before for some reason. Anyways, now I'm getting around 11-12L/100km city driving only (light foot, no boost) and if I drive like my usual I get around 14.5L (which includes revving around 4000rpm every time). So go and check your tire pressure if you were getting the bad gas mileage like me. BTW my car is a 2005 B6 1.8T Quattro automatic. not chipped.

 

I am getting pretty much exactly the same milage with my 2004 B6 1.8T CVT, no APR stage 1 yet!!! mostly i get from 650-700km with spirited driving!
I dont understand why some people dont want to believe the milage we are getting with our CVT's. Based on my research its not as Upgradable as a standard vehicle since the CVT trannys arent as strong, yet! But they seem to be a more efficient set up and give a better power band. So far no regular B6 Auto 1.8T was able to beat my CVT!!

my $0.02 again

 

I actually have the same case. My B6 quattro fuel consumption is 6.6km/liter while the engine is cold. But it gets to 10k-12km/litre once the engine is warm. I think the quattro does make a big difference on this.

Xeon