GR86 Real World MPG

What is your real world average MPG?


  • Total voters
    187
Last tankful was 25mpg, LOTS of short local journeys, after filling the meter was saying 25.9mpg so not far out. I deliberately took it past 0 range by about 12 miles to see how conservative the range meter is, I got 46.5 litres in so I reckon 25/30 miles is doable beyond 0 even doing short uneconomical journeys.
 
Manual states approx 7.0L when the warning light goes on, which I'd probably trust more than remaining range. At 25mpg that's 38.46 miles.
 
Latest fill up worked out at 32mpg. Mostly urban so still surprising me with it's, relative, frugality!
That's good going for urban.

A half tank of short trips gave me 28.5mpg, oops, might need to adjust my vote.
 
600miles in Europe, 37mpg, cruise control with some high speed runs. Cracking 👍
Great stuff, hope you had a good break.

Now there's a backlog of boot strap orders that require your attention, probably...

:)
 
Thread to discuss fuel efficiency of the GR86.

Please use real world fuel consumption where possible (fuel used vs miles), as the one reported by the car may not be accurate.

You can adjust the choice in the poll at any time.

Feel free to share your driving habits and tips that help you with improving efficiency or performance of the car.
Smiles per gallon remember 🤪🤍♥️🖤💯❤️😎
 
Went to brands hatch a couple of weeks ago. Was only 800 miles on the car at the time of driving it. Got 38 although I didn't reset it. I can see 40+ being quite easy as there was 2 of us and the boot was full of camping gear.

330 miles to the tank with a good 20-30 ish left in the tank when I refilled.
 
Not really sure how the average works on the car if it’s over total mileage or since last reset etc.

Currently at around 4,700 miles. Cars showing an average of 34.3. Pretty mixed mileage across 2 European road trips of lots of mountain passes, motorway cruising and a little bit of city driving. Quite happy with that as an average!
 
Not really sure how the average works on the car if it’s over total mileage or since last reset etc.

Currently at around 4,700 miles. Cars showing an average of 34.3. Pretty mixed mileage across 2 European road trips of lots of mountain passes, motorway cruising and a little bit of city driving. Quite happy with that as an average!

I think it's since last reset...if you call up the display and then press and hold the centre of the right D-pad on the steering wheel, it should reset values.
Ideally I'd like that, and another one which shows MPG since last fill up, so I could have a long term average plus an idea of performance over each tank. No biggie though, I will just have to reset my odometer and do the arithmetic each time.
 
I think it's since last reset...if you call up the display and then press and hold the centre of the right D-pad on the steering wheel, it should reset values.
Ideally I'd like that, and another one which shows MPG since last fill up, so I could have a long term average plus an idea of performance over each tank. No biggie though, I will just have to reset my odometer and do the arithmetic each time.
I use fuelio app but like you say it hardly rocket science to work it out manually.
 
Sorry if this is covered elsewhere on the forum but having read my manual briefly last night it states that you can run the car on E5 or E10 fuel. I assume therefore that (as this is in print) it will have zero effect on the warranty.

What will the impact be on day to day running if I opt to use the cheaper fuel?
 
Sorry if this is covered elsewhere on the forum but having read my manual briefly last night it states that you can run the car on E5 or E10 fuel. I assume therefore that (as this is in print) it will have zero effect on the warranty.

What will the impact be on day to day running if I opt to use the cheaper fuel?
No affect on the warranty if you use E10, you might get slightly better mpg from E5 and a slight increase in performance but if you can actually notice it then you are the Stig AICMFP.
 
Sorry if this is covered elsewhere on the forum but having read my manual briefly last night it states that you can run the car on E5 or E10 fuel. I assume therefore that (as this is in print) it will have zero effect on the warranty.

What will the impact be on day to day running if I opt to use the cheaper fuel?
There's some technical explanations of the difference somewhere on here. Doesn't effect the warranty.

The ECU will make adjustments based on the fuel you're using. What I'd like to know is how long does that take - is it worked out over hundreds of miles, or is it as soon as you change the fuel? Because if it's the latter, I'm not sure what the benefit of premium fuel is when running the car in below 4k rpm.
 
There's some technical explanations of the difference somewhere on here. Doesn't effect the warranty.

The ECU will make adjustments based on the fuel you're using. What I'd like to know is how long does that take - is it worked out over hundreds of miles, or is it as soon as you change the fuel? Because if it's the latter, I'm not sure what the benefit of premium fuel is when running the car in below 4k rpm.
I'm due to brim the car today if I can shake off the man flu I have ;-) so I think I'll use the e10 this time as i'm running in at relatively low revs and see how I go

For a totally full tank it's about £7 more for the premium
 
My commute is 60 miles each way pretty much all dual carriageway and motorway. Thought I'd test and see what the best mpg I could get was yesterday...managed 43mpg over the 120 mile trip sticking to mainy 60mph.

Happy with that plus driving at 60 on motorways is far less stressful than constantly changing lanes to overtake, and only adds about 5 mins onto my travel time!
 
There's some technical explanations of the difference somewhere on here. Doesn't effect the warranty.

The ECU will make adjustments based on the fuel you're using. What I'd like to know is how long does that take - is it worked out over hundreds of miles, or is it as soon as you change the fuel? Because if it's the latter, I'm not sure what the benefit of premium fuel is when running the car in below 4k rpm.
It will be instant, the car adjusts its short term fuel trims continuously and the knock sensor will pick up any detonation which will tell the ECU to alter timing and ignition.
 
I'm due to brim the car today if I can shake off the man flu I have ;-) so I think I'll use the e10 this time as i'm running in at relatively low revs and see how I go

For a totally full tank it's about £7 more for the premium
I’ve found my cars run rough on the E10 and smell of fuel. Even the ones that are meant to be able to use it. I use E5 even in the ones that don’t technically need it.
 
My commute is 60 miles each way pretty much all dual carriageway and motorway. Thought I'd test and see what the best mpg I could get was yesterday...managed 43mpg over the 120 mile trip sticking to mainy 60mph.

Happy with that plus driving at 60 on motorways is far less stressful than constantly changing lanes to overtake, and only adds about 5 mins onto my travel time!
That is impressive and literally double my tank average on a short commute without trying to save the planet.
 
My commute is 60 miles each way pretty much all dual carriageway and motorway. Thought I'd test and see what the best mpg I could get was yesterday...managed 43mpg over the 120 mile trip sticking to mainy 60mph.

Happy with that plus driving at 60 on motorways is far less stressful than constantly changing lanes to overtake, and only adds about 5 mins onto my travel time!
I do this now and then when not in a hurry.

There something pretty cool about pootling along in a sports car.

It makes it feel all the more special when you get to a decent twisty road.
 
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