Gas Mileage Going Up? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

VIP BRZ · 10-05-2022, 12:04 PM

Anyone else?

Ive got a 2014 that i put 100,000 miles on and the average has always stuck at 27.1

now all of a suddon after all these years its 27.2 .... spooky mystery, just in time for October!

Im just hoping it will keep going up!!

Dadhawk · 10-05-2022, 12:21 PM

Mine has slowly crept up over the 200K miles I've had it. My driving style hasn't changed, nor has the 90% of my driving that is the exact same route daily. There are some seasonal fluctuations based on winter vs summer blends, etc.

x808drifter · 10-06-2022, 08:53 AM

I got rid of the heavy ass 18's that were on the car and got nearly 5mpg. XD

Grady · 10-06-2022, 02:14 PM

Quote:

Originally Posted by Dadhawk

Mine has slowly crept up over the 200K miles I've had it. My driving style hasn't changed, nor has the 90% of my driving that is the exact same route daily. There are some seasonal fluctuations based on winter vs summer blends, etc.

Someone has way too much time on their hands!

Dadhawk · 10-06-2022, 02:18 PM

Quote:

Originally Posted by Grady

Someone has way too much time on their hands!

Nah, just a spreadsheet nerd. Since I track every tank of fuel through Fuelly it took a few seconds about 5 years ago to create the graph.

VIP BRZ · 11-21-2023, 12:31 PM

Up to 29.2 average now!!

kraftyone · 11-21-2023, 12:59 PM

I changed motor oil and went from an average of 32.3mpg to 34 0mpg didn't expect that.

Sent from my SM-S916U using Tapatalk

tarzan_nojane · 11-23-2023, 01:12 PM

Tires get harder as they age - I got my best mileage just before I swapped out 5½ year-old OEM Primacys a while back.

Lantanafrs2 · 11-23-2023, 01:57 PM

Worn tires are smaller in diameter

JD001 · 11-25-2023, 08:35 AM

Quote:

Originally Posted by VIP BRZ

Anyone else?

Ive got a 2014 that i put 100,000 miles on and the average has always stuck at 27.1

now all of a suddon after all these years its 27.2 .... spooky mystery, just in time for October!

Im just hoping it will keep going up!!

You'll see a big jump if you ditch the dead cat currently decorating your tow hook.. Oh remove the tow hook too as I'm sure it fucks up the airstream separation (can't remember the techy word for it..).

Grady · 11-26-2023, 10:36 AM

Bringing a thread back from the dead, I still get around 14mpg!

cmiovino · 11-30-2023, 08:17 PM

Remember to actually do the calculation when you fill up and don't rely on the car. Mine consistently reads exactly 2 MPG higher.

My average is exactly 24.0 through 80 fill ups in my 2017, doing the manual calculation. Mostly autocross though. So driving to the location, a lot of idling, hard driving, then back.

All highway, I've topped 31.5 MPG. I can get about 30 rather consistently at 50-60MPH with hills.

Dadhawk · 12-01-2023, 07:17 AM

Quote:

Originally Posted by Grady

Bringing a thread back from the dead, I still get around 14mpg!

OK, what am I missing? I would have to leave mine idling for hours to get anywhere near that number.

Grady · 12-01-2023, 09:17 AM

Quote:

Originally Posted by Dadhawk

OK, what am I missing? I would have to leave mine idling for hours to get anywhere neat that number.

Dallas traffic, E85, Turbo.

If I can get on a highway without traffic and on premium gas I can get 26 to 28 mpg at around 75mph.

10-05-2022, 12:04 PM	#1
VIP BRZ Senior Member Join Date: Mar 2016 Drives: 2014 Subaru BRZ Location: CA - San Fernando Valley Posts: 492 Thanks: 242 Thanked 333 Times in 179 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Gas Mileage Going Up? Anyone else? Ive got a 2014 that i put 100,000 miles on and the average has always stuck at 27.1 now all of a suddon after all these years its 27.2 .... spooky mystery, just in time for October! Im just hoping it will keep going up!!

10-05-2022, 12:21 PM	#2
Dadhawk 1st86 Driver! Join Date: Feb 2012 Drives: '13 FR-S (#3 of 1st 86) Location: Powder Springs, GA Posts: 19,814 Thanks: 38,823 Thanked 24,939 Times in 11,376 Posts Mentioned: 182 Post(s) Tagged: 4 Thread(s)	Mine has slowly crept up over the 200K miles I've had it. My driving style hasn't changed, nor has the 90% of my driving that is the exact same route daily. There are some seasonal fluctuations based on winter vs summer blends, etc. Attached Images __________________ Visit my Owner's Journal where I wax philosophic on all things FR-S Post your 86 or see others in front of a(n) (in)famous landmark. What fits in your 86? Show us the "Junk In Your Trunk".

11-30-2023, 08:17 PM	#12
cmiovino Senior Member Join Date: Aug 2020 Drives: 2017 BRZ PP, 2004 WRX Location: Pittsburgh Posts: 347 Thanks: 16 Thanked 249 Times in 157 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Remember to actually do the calculation when you fill up and don't rely on the car. Mine consistently reads exactly 2 MPG higher. My average is exactly 24.0 through 80 fill ups in my 2017, doing the manual calculation. Mostly autocross though. So driving to the location, a lot of idling, hard driving, then back. All highway, I've topped 31.5 MPG. I can get about 30 rather consistently at 50-60MPH with hills. __________________ 2017 BRZ Limited Performance Pack - Steel Cities Region SCCA / North Hills Sports Car Club

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10-06-2022, 08:53 AM	#3
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11-21-2023, 12:59 PM	#7
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11-23-2023, 01:57 PM	#9
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