[robardin]

I'd agree about the break in period. I think I drove about 150 miles and went to fill up after the dealer as I could tell the first tank number did seem right as this was my third hybrid owned. Regardless, I run in ECON mode, do 90+% city driving, and get about 61 mpg on a tank. This tank at over 500 miles I'm averaging 62.1. With the 10.6 gallon tank I'll get over 600 miles to the tank.
Details: relatively flat terrain in Texas, desert climate, A/C on 50% of the time, I don't drive like a hypermiler or a grandpa, and I have the 2025 Civic Hybrid Sport Touring. I don't do the odometer vs fuel numbers from the pump, I'm giving you numbers from the Honda computer which is probably a little to my benefit. One thing I learned after my wife would consistently get better mpg than me in our 2023 HAH is that she is a more aggressive driver than I was. She would get pretty hard on the gas - as in accelerate on the Power Meter (the fake rpm gauge) at about 23% to 25% from all stop lights and stop signs. It was slightly more aggressive than me since I was "trying" to get a good mpg number and she could care less. So I started doing it....step on it to about the 25% mark...get up to your speed....say 40 or 45 mph....then run super low on the power meter to keep your speed consistent. Now in the HAH we get 49-51 mpg consistently and in the Civic Hybrid I can hit the 60 mpg with all of the city driving I do. It works for us, some of you should try this method and see if you get a couple mpg improvement. Good luck and let us know if you get better numbers (or not)!

Obviously, the highway is the mpg killer, especially at high speed. When we travel across Texas at 85mph on I-10 and go through the Hill Country we get 37 or 38 mpg to a tank.

What I'd like to know is what the 2025 Civic ST Hybrid engine sounds like at that speed. It's probably almost fully on the ICE engine for that, right?

My recollection of how the 2020 CR-V Hybrid behaved at 75-80 MPH was that it killed the 2.0L 4-cylinder, it revved to over 4500 RPM to do that speed, and did not sound happy about it AT ALL.

I keep reading that the 2025 Civic is different, and great, but what does it do/how does it feel or sound like to push it to 80-85 MPH on the highway?

The 38-ish MPG at that speed would be just fine (obviously still better than even the 1.5T Civic would get), but that "goat being strangled" engine noise was a really strong deterrent, kept me going at 65-70 MPH tops just to stop hearing it using ACC with distance following to some car in front of me to keep my lead foot off the pedal, which maybe was part of its design. LOL. But really boring to drive that way!!

 

[HondaEh]

"Normal" people even in Canada drive 120 on most highways, so it's not that wild lol

I guess that is the reason I avoid 400 series as much as possible. Still prefer doing below 100, leisure drive with full control of the vehicle.
But even on 400 series I do 95 and nobody ever complained... I believe hybrid will push me off highways completely as it will shine at lower speed, traffic lights and stop signs...
But people working 3-4 jobs just to survive no wander they have to drive like crazy.

 

[zeRep]

I do 95 and nobody ever complained...

59mph on the highway?!?!?!?!? lol nobody ever complained that you KNOW OF lol

people 110% gave you the finger haha

 

[pi.actual]

What I'd like to know is what the 2025 Civic ST Hybrid engine sounds like at that speed. It's probably almost fully on the ICE engine for that, right?

My recollection of how the 2020 CR-V Hybrid behaved at 75-80 MPH was that it killed the 2.0L 4-cylinder, it revved to over 4500 RPM to do that speed, and did not sound happy about it AT ALL....

The CRV has different gearing. The ICE coupling on the Civic is an overdrive ratio, I think it's around 0.8 Can't say what the rpm is at 80 since there is no tach but I suppose you could either calculate it or use an OBD2 app on your phone linked to a dongle. I wish The onboard system would allow you to download an app like Torque then you could set up a display with rpm, coolant temp and all sorts of other data. That would be cool. Maybe someone will come up with a hack.

In my experience you don't notice the engine at highway speeds. In fact the only way I usually know it's running is that the EV symbol goes out on the instrument cluster. The system is very seamless, it just drives like a normal car and you don't think about it.

 

[pi.actual]

I learned something new watching this video explanation of the Honda hybrid system. The video is four years old and he is talking about the system with a 1.5 liter engine for the Honda Jazz (I think Japanese market) but it is the same exact system. What I learned is that the direct engine coupling occurs between the speeds of 80 to 120 kph (50-75 mph) and will do so on average 75% of the time. Over 120 kph (75 mph) the engine is not directly coupled and the system runs 100% of the time in hybrid mode. So even though the engine is running, it is not running at a high rpm as some have thought. It is only running the generator at the most efficient rpm to power the traction motor and charge the battery.

Honda eHEV hybrid system - how it works

 

[Roro]

I learned something new watching this video explanation of the Honda hybrid system. The video is four years old and he is talking about the system with a 1.5 liter engine for the Honda Jazz (I think Japanese market) but it is the same exact system. What I learned is that the direct engine coupling occurs between the speeds of 80 to 120 kph (50-75 mph) and will do so on average 75% of the time. Over 120 kph (75 mph) the engine is not directly coupled and the system runs 100% of the time in hybrid mode. So even though the engine is running, it is not running at a high rpm as some have thought. It is only running the generator at the most efficient rpm to power the traction motor and charge the battery.

Honda eHEV hybrid system - how it works

Great video, but I suspect the >120kph thing is unique to that Jazz 1.5 engine where it can't deliver the efficiency with motor driving the wheels.

Everything I've seen on the civic hybrid says motor is almost always engaged at highway speeds.

I could be wrong though... someone should hook up their OBD and do a full drive on a North America highway. There was someone on this forum that did that, to demonstrate some of the lower speed modes including how engine braking still exists. But they were driving on Micky mouse country roads so you couldn't get the full picture.

 

[azgman9]

Great video, but I suspect the >120kph thing is unique to that Jazz 1.5 engine where it can't deliver the efficiency with motor driving the wheels.

Everything I've seen on the civic hybrid says motor is almost always engaged at highway speeds.

I could be wrong though... someone should hook up their OBD and do a full drive on a North America highway. There was someone on this forum that did that, to demonstrate some of the lower speed modes including how engine braking still exists. But they were driving on Micky mouse country roads so you couldn't get the full picture.

Both my 2024 CR-V and 2025 Civic hybrids will switch between ICE mode and battery mode at speeds higher than 120kph. Most of the time the ICE is running at those speeds, but if the conditions are right, they will run on battery only.

 

[pi.actual]

The engine sizes, both ICE and electric are larger on the Civic so the speed ranges are different. I have seem my Civic in EV mode up to just under 80 mph but the system and how it operates is identical. Over 80 mph, while the engine is running, it is not coupled to the wheels and is in hybrid mode. You can observe this on the power flow synoptic display and an OBD display of tachometer would show no direct connection between wheel speed and rpm.

 

[92595 Civic H]

Everyone was right about the break-in period! My MPG has really improved. Since my last fill-up, I’m consistently getting 45–46 MPG average , which is a big jump from the high 30s I was getting at first. Really happy with this, especially since I’m not even driving slow on the freeway!

 

[Roro]

Everyone was right about the break-in period! My MPG has really improved. Since my last fill-up, I’m consistently getting 45–46 MPG average , which is a big jump from the high 30s I was getting at first. Really happy with this, especially since I’m not even driving slow on the freeway!

Glad to hear things improved 🙂 can rest easy now

 

[buzz64]

I recently bought a Honda Civic Sport Hybrid Hatchback, but I’m experiencing poor gas mileage. I’m not sure if there’s a break-in period or procedure I need to follow, but the car isn’t giving me the fuel efficiency I expected. For comparison, my 2016 Honda Civic averages around 33-34 MPG, and the hybrid isn’t performing noticeably better.

I’m unsure if I’m doing something wrong or if there’s an issue with the car itself, but it’s frustrating. I’m considering taking it back to the dealer to figure out what’s going on.

Has anyone else experienced something similar or know why this might be happening? Any advice would be appreciated before I take it in for service. Thank you! View attachment 23581

I have a 2025 Civic Hybrid Sport Touring Sedan. I have had it a little over 2 weeks, and I have put a little over 350 miles on it; a combination of city and highway driving. The car says I have averaged 48.2 mpg. Very happy so far.

 

[Roro]

I thought I'd pitch in some info too. My first tank on the car, which is halfway done, is averaging 52mpg. Mix of city/highway.

Also not super reflective of realistic driving, but Toronto has something like 3rd worst traffic in the world, and the other day I took a 25km ride in stop and go highway traffic followed by downtown driving.

That drive measured 87mpg at the end of highway stop/go, and 67mpg at the end of the full trip! Low speed ACC + LKAS basically meant the car was driving itself.

The hybrid really thrives in city and traffic.

 

[farmerjack]

I thought I'd pitch in some info too. My first tank on the car, which is halfway done, is averaging 52mpg. Mix of city/highway.

Not super reflective of realistic driving, but Toronto is something like 3rd worst traffic in the world, and the other day I took a 25km ride in stop and go highway traffic followed by downtown driving.

That drive measured 87mpg at the end of highway stop/go, and 67mpg at the end of the full trip! Low speed ACC + LKAS basically meant the car was driving itself.

The hybrid really thrives in city and traffic.

That it does! I've found when I drive into Atlanta and crawl around i285, my fuel economy skyrockets from my typical 45-46mpg to 50-55mpg easily.

 

[Fujisawa]

I thought I'd pitch in some info too. My first tank on the car, which is halfway done, is averaging 52mpg. Mix of city/highway.

Also not super reflective of realistic driving, but Toronto has something like 3rd worst traffic in the world, and the other day I took a 25km ride in stop and go highway traffic followed by downtown driving.

That drive measured 87mpg at the end of highway stop/go, and 67mpg at the end of the full trip! Low speed ACC + LKAS basically meant the car was driving itself.

The hybrid really thrives in city and traffic.

don't forget, Canadian gallons and American gallons are different.
just for fun i suppose.

 

[Graylon Johnson]

I get 48 mpg on my Touring. 580 miles on it.

 

[pi.actual]

I now have 5200 miles and the Trip B meter, which has never been reset, reads 48.9 mpg. This is over all types of driving excluding rain/snow or winter so I have not yet used the heated seats, cabin heat or even the wipers but A/C has always been on and probably 90% has been in NORMAL mode.

 

[HondaEh]

don't forget, Canadian gallons and American gallons are different.
just for fun i suppose.

Sorry, WE Canadians do NOT use imperial (outdated and archaic) measuring system. I do not know why that Canadian guy typed consumption in gallons... I am to lazy to convert it into Proper measurement. I guess it is 'mine is bigger than yours' mentality

We are proud Metric people... Even though almost all stores show vegies/fruits/meat prices per pound. It is a trick to think it is cheap but at the cashier you per per kilogram. Buahahahha.

 

[robardin]

Sorry, WE Canadians do NOT use imperial (outdated and archaic) measuring system. I do not know why that Canadian guy typed consumption in gallons... I am to lazy to convert it into Proper measurement. I guess it is 'mine is bigger than yours' mentality

We are proud Metric people... Even though almost all stores show vegies/fruits/meat prices per pound. It is a trick to think it is cheap but at the cashier you per per kilogram. Buahahahha.

I think he was referring to/thinking of what happens in the UK, where they do use miles for road distances and "Imperial" gallons for "miles per gallon" fuel economy ratings, but use a different/larger gallon than the US does, where a gallon is NOT "Imperial" but just "gallon" or "'Murican gallon". Even though the fuel is sold at "petrol" stations there in "litres". (The miles, however, are the same length.)

So over there, you can either read fuel economy as km/L where they'd have to "convert" road distances from miles to km to think about how much fuel it would take to go from Bristol to Birmingham or something, or else in Miles per (Imperial) Gallon and have to think about it as 4 Imp Gal to about 18.18 Litres (or 4.8 US Gal).

It's also why an (Imperial) "pint" of beer in the UK is more beer (20 fl. oz., a bit more than 568 mL) than a pint of beer in the US (16 fl. oz., or about 473 mL).

Even more confusing, a "pint" of beer in Canada is also defined as 568 mL. Even though when a Canadian reads "miles per gallon" figures about their car, it's almost certainly based on the US gallon.

 

[Roro]

I think he was referring to/thinking of what happens in the UK, where they do use miles for road distances and "Imperial" gallons for "miles per gallon" fuel economy ratings, but use a different/larger gallon than the US does, where a gallon is NOT "Imperial" but just "gallon" or "'Murican gallon". Even though the fuel is sold at "petrol" stations there in "litres". (The miles, however, are the same length.)

So over there, you can either read fuel economy as km/L where they'd have to "convert" road distances from miles to km to think about how much fuel it would take to go from Bristol to Birmingham or something, or else in Miles per (Imperial) Gallon and have to think about it as 4 Imp Gal to about 18.18 Litres (or 4.8 US Gal).

It's also why an (Imperial) "pint" of beer in the UK is more beer (20 fl. oz., a bit more than 568 mL) than a pint of beer in the US (16 fl. oz., or about 473 mL).

Even more confusing, a "pint" of beer in Canada is also defined as 568 mL. Even though when a Canadian reads "miles per gallon" figures about their car, it's almost certainly based on the US gallon.

No idea what y'all are talking about. I converted my usual L/100km to MPG for the sake of people on this forum being mostly from the US 🤷‍♂️

 

[Roro]

Sorry, WE Canadians do NOT use imperial (outdated and archaic) measuring system. I do not know why that Canadian guy typed consumption in gallons... I am to lazy to convert it into Proper measurement. I guess it is 'mine is bigger than yours' mentality

We are proud Metric people... Even though almost all stores show vegies/fruits/meat prices per pound. It is a trick to think it is cheap but at the cashier you per per kilogram. Buahahahha.

Because everyone is contributing their economy in MPG so it doesn't make sense for me to start spewing metric numbers. Context matters, relax with the Canadian pride lol