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Did a 400mile trip today and there were times when we were crawling at 2-5mph for 10 minute at a time. Overall 1 hour out of 8 hours was a crawl with additional 30 minutes in local city traffic. Took a snap half way, 25.6mpg
I am impressed. If I didn't get stuck at those nasty congested locations, this could have been easily 26-27mpg. The reason I know it could have been much better was because my city mpg is about 17.
Highway speed was generally about 80, so I was surprised to see 48mph average.
Filled up last night, headed out this morning, after 400 miles I still have 1/4 tank gas left.
PS: I love the ACC, for more than 200 miles I did not touch either pedal. I am so glad I got it. Last year I did the same trip with my X5 with regular non-adaptive cruise control, and fatigue is no comparison.
Don't be fooled by the dashboard numbers.. I always find in Audi's its at least 2-3 mpg higher than actual... The best test is to do fill up - drive - fill up again and do the math. Still for a 7 seater mpg is not bad..
That IS impressive. Is your Q7 a 2.0 or a 3.0T?
For comparison, our 2015 TDI just today went 615 miles on 22.99 gal between Birmingham and Dallas. 27.9 mpg at 75-80 most of the way.
It will get 30 mpg at 65-70 mph. Still love our “ dirty diesel”. We had a 2011 that had to go back so we replaced it with this one in February.
That is what I am getting too on an average HWY trip (2017, 3.0), granted that air temps are favorable, not going against strong wind, etc. I've compared calculated and real at-the-pump MPG numbers many times and found that dashboard computer numbers are always no more than 0.3-0.7 MPG apart from real numbers. I guess drastic driving and constantly changing driving conditions are the major factors affecting calculated MPG numbers accuracy.
Last edited by ConservativeConsumer; 07-19-2018 at 06:32 PM.
Reason: cc
Our 2015 TDI with the emissions fix has settled on about 27 mpg on a Long highway trip. On this one at least the computer is always within 1/2 mpg of the calculated miles driven/gallons consumed. It IS easy to see how there could be inaccuracies however. The fuel usage is calculated by measuring how long and how many times each fuel injector is open. Small variations in fuel injectors or in fuel pressure at the fuel rail would create inaccuracies in the mileage reported by the trip computer.
On my modded 2001 TT I installed an adjustable fuel pressure regulator and turned fuel pressure up to 3 1/2 bar in order to get a bit more fuel at high engine loads. Indicated fuel mileage went UP by nearly 4 mpg because the injectors were staying open for a shorter time to achieve proper fuel air mix as read by the O2 sensors. The mileage computer doesn’t know that the pressure is turned up and more fuel is flowing. It assumes less is being used due to the shorter injector openings. I find it amazing that they are as accurate as they are.
~70mph average for 5 hours, man you are lucky!
I really love Q7's highway mileage, really really impressive, even if real word numbers are a bit off, mpg on dash is close enough that it makes you wonder how come other SUV's can't manage the same efficiency.
I think Audi found the sweet spot with 3.0 supercharge and I tend to believe even 2.0 wouldn't be able to do same at these speeds since it has to work harder and possible consume more fuel? Or is that a misconception?
~70mph average for 5 hours, man you are lucky!
I really love Q7's highway mileage, really really impressive, even if real word numbers are a bit off, mpg on dash is close enough that it makes you wonder how come other SUV's can't manage the same efficiency.
I think Audi found the sweet spot with 3.0 supercharge and I tend to believe even 2.0 wouldn't be able to do same at these speeds since it has to work harder and possible consume more fuel? Or is that a misconception?
Yeah, we hauled ***. Left home at 6AM to head south, missed all traffic and made only one stop for bio break as it was just me and my son. As you can imagine 70mph average means I was routinely in the 80-90 range for periods of time. So yeah, I think the 3.0 makes that mpg possible as it is not overly stressed
04-26-2018, 04:58 PM
400 mile trip today 25mpg
