05-03-2022, 04:46 PM
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#31 (permalink)
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Mechanical engineer
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80- 93 MPH speeds average being about 87 MPH for 800km 497 miles consumption 5,6 l/100km or 43 MPG with roof box on top of the Audi A2.
https://youtu.be/BtY7zt9qR6E
Slower speeds about 90km/h avg speed 3,85 l/100km or 61MPG for 1000km
Setup can be seen in this video.
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05-03-2022, 05:24 PM
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#32 (permalink)
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Human Environmentalist
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Man, I wish I could travel 500 miles at 93 MPH... and at that level of efficiency.
I'd have to drive 45 MPH in the Mazda CX-5 to achieve 43 MPG.
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06-02-2022, 07:48 AM
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#33 (permalink)
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EcoModding Lurker
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CVTCivic - '17 Honda Civic 4D Touring Sedan 90 day: 39.16 mpg (US)
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Found this post in a thread about the previous gen Hyundai Sonata Hybrid (2018), thought this would fit here:
Quote:
Originally Posted by oil pan 4
Drove it 340 miles at 80mph most of the way it got 40mpg.
It was getting 44mpg but the calm to no wind condition turned into a head wind.
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06-02-2022, 11:25 AM
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#34 (permalink)
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EcoModding Lurker
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CVTCivic - '17 Honda Civic 4D Touring Sedan 90 day: 39.16 mpg (US)
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Quote:
Originally Posted by Hersbird
What's the best 80 mph average others have gotten?
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Traffic flow here is just too bad to hit an average speed of 80 mph at daylight. When the ACC is set to 80 mph you get an average speed of only 70 mph at the end. The fuel consumption was 47 mpg (5 l/100km).
Car is a The 2017 Honda Civic 1.5 Turbo with a CVT.
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06-03-2022, 02:31 AM
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#35 (permalink)
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Master EcoModder
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Quote:
Originally Posted by CVTCivic
Traffic flow here is just too bad to hit an average speed of 80 mph at daylight. When the ACC is set to 80 mph you get an average speed of only 70 mph at the end. The fuel consumption was 47 mpg (5 l/100km).
Car is a The 2017 Honda Civic 1.5 Turbo with a CVT. |
I was in the low 50s yesterday going 80 with cruise control. Then 11 mph kicked in and dropped me down to 48-49mpg and I got mad |
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06-03-2022, 07:05 PM
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#36 (permalink)
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EcoModding Lurker
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CVTCivic - '17 Honda Civic 4D Touring Sedan 90 day: 39.16 mpg (US)
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Quote:
Originally Posted by Phase
I was in the low 50s yesterday going 80 with cruise control. Then 11 mph kicked in and dropped me down to 48-49mpg and I got mad
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I totally feel that. I usually don't drive that fast to avoid getting mad about a ruined gas mileage. And here are too many inclines, those will destroy the fuel economy if you drive too fast. So I'm normally driving at an average speed of only 55 mph.
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06-03-2022, 09:13 PM
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#37 (permalink)
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Master EcoModder
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Quote:
Originally Posted by CVTCivic
I totally feel that. I usually don't drive that fast to avoid getting mad about a ruined gas mileage. And here are too many inclines, those will destroy the fuel economy if you drive too fast. So I'm normally driving at an average speed of only 55 mph.
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Well I was driving 700 miles in one day across multiple states in the high desert out west. Wasn’t trying to hyper mile. On long trips, going even a few mph can save you hours… |
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06-04-2022, 06:32 PM
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#38 (permalink)
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Master EcoModder
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The good thing about having an inefficient drivetrain is...higher speeds don't reduce fuel economy much XD
With my short geared, big cam V8, I get 25mpg at 60, 22mpg at 70 and 20mpg at 80. Climbing a hill takes barely more fuel than going on flat land because half the fuel goes towards heating the engine oil.
I've been thinking about adding a box cavity to the rear of cars to use less fuel on long trips though, probably doable with just cardboard (sprayed with paint or something to repel water) and cargo straps.
Last edited by serialk11r; 06-04-2022 at 06:53 PM..
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06-05-2022, 10:12 AM
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#39 (permalink)
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EcoModding Lurker
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CVTCivic - '17 Honda Civic 4D Touring Sedan 90 day: 39.16 mpg (US)
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Quote:
Originally Posted by Phase
Well I was driving 700 miles in one day across multiple states in the high desert out west. Wasn’t trying to hyper mile. On long trips, going even a few mph can save you hours…
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I just thought you were hyermiling because you mentioned 50 mpg 
700 miles on one day is incredible, I once drove 700 miles relatively fast but with a pretty fuel efficient Diesel BMW.
Google Maps says this trips takes 9 hours 
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06-05-2022, 01:44 PM
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#40 (permalink)
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Master EcoModder
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Quote:
Originally Posted by CVTCivic
I just thought you were hyermiling because you mentioned 50 mpg
700 miles on one day is incredible, I once drove 700 miles relatively fast but with a pretty fuel efficient Diesel BMW.
Google Maps says this trips takes 9 hours
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Don’t think 80mph on cruise control is hypermiling for me lol. The headwind really messed me up though. Sometimes I have to put cruise control on 88 or 89 mph in the desert because the highway speed limit jumps to 80 or 85mph and everyone’s trying to go 90. Maintaining 90mph still drains gas, even in a hybrid with a cd of .24. Hence why I need to do more aero mods
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