A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004

A6 Fuel capacity question

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Old Jul 25, 2007 | 07:55 PM
  #1  
rcl4668's Avatar
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Default A6 Fuel capacity question

A friend of mine has a 2004 Audi A6 4.2 (I think this is the one with
> the 300 hp V-8). He e-mailed me the following question:
>
> "My car was close to empty today when I filled up the tank. I was
> surprised to
> see my receipt say that I paid for 22.807 gallons, when according to
> the owner's manual, the fuel capacity of my car is listed as 21.7
> gallons. The
> manual does say that there's a 2.4 gallon reserve, but I thought that
> was part
> of the 21.7 gallon total capacity. You think there's something
> fishy happening at Lukoil (siphoning profits to prop up Putin perhaps?)
> or am I misunderstanding how the fuel reserve is calculated?"
>
> Does someone who is familiar with the A6 4.2 know the answer? My
> understanding from my cars (BMW, Dodge, MINI, Honda) is that the fuel
> capacity spec in the owners manual is in fact the total storage
> capacity for the tank.
>
> Thanks for any insights you can provide.
>
> /Rich
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Old Jul 25, 2007 | 08:12 PM
  #2  
audikillsbmw's Avatar
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Default

I thought that the spec was both numbers combined as well...
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Old Jul 25, 2007 | 08:24 PM
  #3  
jsbautowholesale's Avatar
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Default I believe the fuel capacity doesn't take into account the fuel filler neck

which I believe will hold a couple of gallons
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Old Jul 26, 2007 | 04:21 AM
  #4  
02 Silver Arrow's Avatar
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Default He must have been pretty empty, i have never gone over 20 gallons

Could have been they filled the neck up to the cap. To thebest of my knowledge the owners manual specifies total including reserve. the 2.4 gallons is when the light goes on
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