4.2L reliability and fuel consumption
02-07-2011, 09:55 PM
#33
Audi Forum - Posts like an A4
Join Date: Jul 2010
Location: Toronto
Posts: 161
Re: 4.2L reliability and fuel consumption
On highway I've had as much as 800 km on full tank (90litres) and didn't push it into gas station 
Generally getting about 14L/100km mixed mileage with horrible city conditions. Depends on your driving style . I also never use anything less than 94 Octane (R+M/2), old Sunoco Gold. Definitely has more power than with lower octane fuels. I'm not worried about Ethanol at all. Max they use is 10% and these engines and components are made and approved for that. I've been using 94 Octane for >200,000km and it hasn't caused any problems (that I know of). I never required any engine work of any kind until recently (250,000km). Not only did I feel the extra power when I changed after a low Octane tank, but mileage on highway is a bit better.
Generally getting about 14L/100km mixed mileage with horrible city conditions. Depends on your driving style . I also never use anything less than 94 Octane (R+M/2), old Sunoco Gold. Definitely has more power than with lower octane fuels. I'm not worried about Ethanol at all. Max they use is 10% and these engines and components are made and approved for that. I've been using 94 Octane for >200,000km and it hasn't caused any problems (that I know of). I never required any engine work of any kind until recently (250,000km). Not only did I feel the extra power when I changed after a low Octane tank, but mileage on highway is a bit better.
04-01-2011, 10:55 AM
#35
Audi Forum - Posts like an HORCH
Join Date: Dec 2009
Location: Burlington, Ontario
Posts: 2,719
Re: 4.2L reliability and fuel consumption
On highway I've had as much as 800 km on full tank (90litres) and didn't push it into gas station Generally getting about 14L/100km mixed mileage with horrible city conditions. Depends on your driving style . I also never use anything less than 94 Octane (R+M/2), old Sunoco Gold. Definitely has more power than with lower octane fuels. I'm not worried about Ethanol at all. Max they use is 10% and these engines and components are made and approved for that. I've been using 94 Octane for >200,000km and it hasn't caused any problems (that I know of). I never required any engine work of any kind until recently (250,000km). Not only did I feel the extra power when I changed after a low Octane tank, but mileage on highway is a bit better.
Generally getting about 14L/100km mixed mileage with horrible city conditions. Depends on your driving style . I also never use anything less than 94 Octane (R+M/2), old Sunoco Gold. Definitely has more power than with lower octane fuels. I'm not worried about Ethanol at all. Max they use is 10% and these engines and components are made and approved for that. I've been using 94 Octane for >200,000km and it hasn't caused any problems (that I know of). I never required any engine work of any kind until recently (250,000km). Not only did I feel the extra power when I changed after a low Octane tank, but mileage on highway is a bit better.
04-01-2011, 11:58 AM
#36
Audi Forum - Posts like an A1
Join Date: Jul 2010
Location: Vancouver, BC
Posts: 9
04-03-2011, 01:27 PM
#37
Audi Forum - Posts like an A1
Join Date: Mar 2009
Location: Saskatoon, SK
Posts: 8
Re: 4.2L reliability and fuel consumption
We have gotten 900km on road trips before. We can get better than 11 L/100km combined city and highway but generally are closer to 12 L/100km on 91 octane.
08-12-2011, 08:05 AM
#38
Audi Forum - Posts like an A1
Join Date: Mar 2011
Location: Gatineau, Qc
Posts: 5
Re: 4.2L reliability and fuel consumption
I had my car since March 2011 and these are my findings.
2007 C6 A6 4.2 (80L tank) running 91oct
HWY avg 8.8L/100km @ 110km/h
CTY avg 14-15L/100km @ various take off speeds. Half the time in "S" mode.
So far I love this engine. Solid platform.
2007 C6 A6 4.2 (80L tank) running 91oct
HWY avg 8.8L/100km @ 110km/h
CTY avg 14-15L/100km @ various take off speeds. Half the time in "S" mode.
So far I love this engine. Solid platform.
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