Cruising Speed for Optimal Highway Mileage
07-07-2006, 03:45 PM
#4
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Scikotics
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^^ exactly. And even more important is to run at a steady speed and accellerate smoothly. When travelling to my home town I set the cruise at about 80 mph for about 90% of the 9.5 hour drive. I see between 28 - 32 mpg every time, including AC on, AC off, winter, summer, etc.
07-07-2006, 05:12 PM
#8
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sIcKsCiOnS
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Originally Posted by engifineer
Mine is a 5 spd. I was saying exactly to the the post above the one I pointed to, the other guy posted in between.. so it made mine sound a bit confusing 
but was confused
07-11-2006, 04:04 PM
#11
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So let me give you a situation...
Auto, which is better for the MPG...
65-70 mph/ ~2500 rpm
or
80 mph/ ~3k rpm
?
I have 80 miles of hwy commute everyday and I would rather do the quicker option but if I got an extra 80 miles if I went ~65, I wouldn't mind doing it.
Auto, which is better for the MPG...
65-70 mph/ ~2500 rpm
or
80 mph/ ~3k rpm
?
I have 80 miles of hwy commute everyday and I would rather do the quicker option but if I got an extra 80 miles if I went ~65, I wouldn't mind doing it.
07-11-2006, 04:28 PM
#12
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Obviously the slower speeds will be better for MPG.
TO really compare I guess you should fill up, do a trip at 80, and calculate the MPG, and repeat for the other speeds.
My guess would be the slower is better, but it won't make a ton of difference.
TO really compare I guess you should fill up, do a trip at 80, and calculate the MPG, and repeat for the other speeds.
My guess would be the slower is better, but it won't make a ton of difference.
07-11-2006, 09:02 PM
#14
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Depends if you have auto or manual.
On both, best to keep rpms low so I do about 70 on manual (still over 3000 rpm).
The auto is geared much better for highway cruising so I would go a lot faster on without worrying about mileage.
On both, best to keep rpms low so I do about 70 on manual (still over 3000 rpm).
The auto is geared much better for highway cruising so I would go a lot faster on without worrying about mileage.
07-11-2006, 09:11 PM
#15
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Posts: 26
I haven't found there to be a big difference in fuel economy while on the highway at constant speed. I have the 5spd and have done the same trip at 65 and 80 and both times got 31.2mpg. Both times I had the AC on with about the same weather. I would estimate there that there is only about 1mpg at most to be saved by keeping a lower speed.
07-12-2006, 07:42 AM
#18
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Originally Posted by magyver
what rpm doyou guys run at 70mph? im at 3100 w/ the sc... curious if mods change that...
07-13-2006, 08:04 PM
#20
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First part:
http://youtube.com/watch?v=URI80bckL...=Audi%20diesel
Second part:
http://youtube.com/watch?v=qmAK4OB9R...les%20part%202
You guys could learn a couple of tips to save on gas from this video.
http://youtube.com/watch?v=URI80bckL...=Audi%20diesel
Second part:
http://youtube.com/watch?v=qmAK4OB9R...les%20part%202
You guys could learn a couple of tips to save on gas from this video.