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Old 12-17-2018, 01:28 AM   #1 (permalink)
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43 MPG Honda Si (10th gen)

Just turned 10,000 miles in my 2018 Honda Civic Si
(1.5 liter 4 cyl turbo)
Averaging 43 MPG over that whole 10,000 stretch
driving like a granny, premium gas, mainly fwy commute
but includes about 2000 city street miles and a few canyon runs

Drove a 2009 Honda Si for 250,000 miles before this
and never got better than 38 MPG over a 10K stretch

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Old 12-19-2018, 12:12 AM   #2 (permalink)
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ND Miata - '15 Mazda MX-5 Special Package
90 day: 40.81 mpg (US)

Work Vehicle - '17 Toyota RAV4
90 day: 31.8 mpg (US)
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Nice economy in a car that will hit 60 in less than 7 seconds, and has no electrical propulsion. Any mods?
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Old 02-23-2021, 02:01 PM   #3 (permalink)
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CVTCivic - '17 Honda Civic 4D Touring Sedan
90 day: 39.16 mpg (US)
Thanks: 20
Thanked 23 Times in 16 Posts
Are you driving the CVT or manual transmission?

@herektir
Is also driving a 10th gen Civic, are you still owning the car?
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Old 03-01-2021, 10:45 AM   #4 (permalink)
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goldfrontier - '98 nissan frontier xe extended cab
Pickups
Team Nissan
90 day: 33.05 mpg (US)

silvertaco - '09 toyota tacoma prerunner
Pickups
90 day: 28.44 mpg (US)

Agcivicsedan - '17 Honda Civic Lx
Team Honda
90 day: 47.21 mpg (US)
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Yes winter brought 90 day avg down but since ownership 15or 16k miles is about 50 mpg with manual transmission 2.0l engine, no mods.
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Old 03-10-2021, 02:34 PM   #5 (permalink)
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CVTCivic - '17 Honda Civic 4D Touring Sedan
90 day: 39.16 mpg (US)
Thanks: 20
Thanked 23 Times in 16 Posts
50 mpg is amazing, I'm currently at 37 mpg with the 1.5 and the automatic transmission obviously. To get over 50 mpg I have to drive very slow, speeds below 50 mph are not very save on the Autobahn.

Here are some impressive hypermiling posts from a Civic forum:

Quote:
My best is 64 across 37 miles, and Wayne Gerdes got 72.6 over 95 miles in an EX-T coupe (calibrated). Odometer showed 72 mpg across 93.7 miles, so not too far off.

Quote:
Just finished my 2nd 600 plus tank in a row. This one was 634 and I filled up with 11.964 gallons. My Odometer reads about 3% low due to me using 50psi in the tires...
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Old 09-11-2021, 11:16 AM   #6 (permalink)
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Quote:
Originally Posted by jeff.decker View Post
Just turned 10,000 miles in my 2018 Honda Civic Si
(1.5 liter 4 cyl turbo)
Averaging 43 MPG over that whole 10,000 stretch
driving like a granny, premium gas, mainly fwy commute
but includes about 2000 city street miles and a few canyon runs

Drove a 2009 Honda Si for 250,000 miles before this
and never got better than 38 MPG over a 10K stretch
excellent
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Old 09-11-2021, 12:12 PM   #7 (permalink)
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The Van - '95 Chevy Astro Cl V8 Swapped
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90 day: 71.94 mpg (US)

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90 day: 34.35 mpg (US)

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90 day: 40.11 mpg (US)
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In case you hadn't seen it, honda issued a warranty on your engine for loss of power/oil dilution.

https://www.consumerreports.org/car-...turbo-engines/
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https://www.youtube.com/channel/UC6s...LulDUQ8HMj5VKA
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Old 05-31-2022, 06:32 AM   #8 (permalink)
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CVTCivic - '17 Honda Civic 4D Touring Sedan
90 day: 39.16 mpg (US)
Thanks: 20
Thanked 23 Times in 16 Posts
Thumbs up

I drive the same car and I'm only getting an overall fuel consumption of 38 MPG (6.1 l/100km). Although on the last few fuel tanks I got 43.5 MPG (5.4 l/100km).

Found that picture on the Civic forums, someone took the hypermiling with this car to a new level:

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Old 11-10-2022, 02:44 PM   #9 (permalink)
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CVTCivic - '17 Honda Civic 4D Touring Sedan
90 day: 39.16 mpg (US)
Thanks: 20
Thanked 23 Times in 16 Posts
Although OP is gone for a long time now. It fits this thread:

this one Hypermiler on the CivicX forum did 700 miles with one single fuel tank. He was averaging 60 MPG without any ecomodding.

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