Those who've had 1st and 2nd gen - real world mpg difference? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DriveDriftDogfight86 · 02-16-2023, 11:51 AM

I own both side-by-side, I don't notice any difference between the two. I'm not saying that there ISN'T an MPG difference...but I've never driven my 2nd gen and said "Wow, my MPG has gotten pretty bad now".

gnarjunkie · 02-16-2023, 08:38 PM

Quote:

Originally Posted by KillerBMotorsport

Are you guys taking these figures from the in-car MPG calculator or doing the math at fill-up? I know for our Gen-2 there is definitely a difference between the two.

Both. When I first got the car I figured the in-car calculator was making things up. I did the math a couple times at fill up and it came out to within a tenth of the in-car calculator each time.

jongers · 02-16-2023, 11:03 PM

In car calculations w/ 255 tires:

gen 1 w/ updated diff ratio (17+) - 28.9
gen 2 - 25.9

vindiesel · 02-19-2023, 10:15 AM

My 2023 6mt High 20’s mpg hand calculated 90% hwy @75mph-80. I’m sure 60-70 would be at 30-32mpg on flat road.

There has been allot of people shitting on its mpg estimates… but it easily exceeds dealer sticker mpg. Since the 2nd Gen is essentially equivalent to a 1st Gen. supercharged on low boost I would say the increased power output and mpg combo is a very optimistic expectation.

Lelandjt · 03-12-2023, 01:33 AM

I don't get why these cars get such low MPG in highway cruising. My Mazda 3 probably has more air drag, weighs the same, has a 2.0L, and similar gearing. It gets high 40s when cruising at 70mph. Seems like this car should get 40mpg.

ACT86 · 03-12-2023, 04:36 AM

Only had my Gen 2 for a week or so, but covered quite a few ks. Economy seems near identical to my 2017 GTS so far.

Desertnate · 03-13-2023, 09:26 AM

Quote:

Originally Posted by Lelandjt

I don't get why these cars get such low MPG in highway cruising. My Mazda 3 probably has more air drag, weighs the same, has a 2.0L, and similar gearing. It gets high 40s when cruising at 70mph. Seems like this car should get 40mpg.

Gear ratios? Does your Mazda have a manual or an auto? Many of our BRZ's have manuals and these days they tend to get less gas mileage compared to the auto's even in instances when both transmissions have the same number of gears.

I've also noticed, Subaru's across the board seem to trail other Japanese brands when it comes to gas mileage and they are way behind the Germans when it comes to the efficiency of their 4 cylinder engines. My 2013 GTI which was heavier and less aerodynamic got measurably better mileage in average usage and on the highway.

I have to admit, gas mileage wasn't in the top criteria for choosing the car and I'm happy it out performs expectations. Still love the car.

Tcoat · 03-13-2023, 10:41 AM

Quote:

Originally Posted by Lelandjt

I don't get why these cars get such low MPG in highway cruising. My Mazda 3 probably has more air drag, weighs the same, has a 2.0L, and similar gearing. It gets high 40s when cruising at 70mph. Seems like this car should get 40mpg.

Detune the Twins and get the same.

Dzmitry · 03-13-2023, 10:48 AM

Quote:

Originally Posted by Lelandjt

I don't get why these cars get such low MPG in highway cruising. My Mazda 3 probably has more air drag, weighs the same, has a 2.0L, and similar gearing. It gets high 40s when cruising at 70mph. Seems like this car should get 40mpg.

Gear ratio is definitely one of the biggest factors. Cruising at 70mph at 3-3.5K RPM or whatever it is with the new gen is a poor way to get good mpg ratings. I recall someone that posted a 3.7 FD for the first gen a few years ago from the EU market that showed an advertised mpg rating of over 40mpg on highway.

EDIT:
In fact, here it is.
https://www.ft86club.com/forums/showthread.php?t=141509

OkieSnuffBox · 03-13-2023, 02:24 PM

To be honest, I didn't pay attention in my first gen......new to 36k miles. I haven't paid in attention in my 2nd gen.........new to 1100 miles.

Lelandjt · 03-13-2023, 03:44 PM

Is a taller final drive gear set available for our diffs?

vindiesel · 03-13-2023, 03:44 PM

Sold my brz; I couldn’t afford the gas. It was 3mpg less than I thought (I’m waiting to hear this about any sports car.

More hp trq and close to same gearing from the first gen would theoretically net the same or higher mpg… the difference in fuel is a Taco Bell quesadilla worth either you get the shits or you smile.

AK2112 · 03-13-2023, 05:26 PM

added up my gas receipts for the first year with the car

daily commute is 18 miles round trip of suburban driving. car rarely sees the highway.

vindiesel · 03-13-2023, 07:04 PM

Quote:

Originally Posted by AK2112

added up my gas receipts for the first year with the car

daily commute is 18 miles round trip of suburban driving. car rarely sees the highway.

That’s exceptional

02-16-2023, 11:51 AM	#15
DriveDriftDogfight86 Senior Member Join Date: Jan 2016 Drives: '23 BRZ Limited 6MT; '13 FR-S 6MT Location: California Posts: 108 Thanks: 611 Thanked 113 Times in 49 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I own both side-by-side, I don't notice any difference between the two. I'm not saying that there ISN'T an MPG difference...but I've never driven my 2nd gen and said "Wow, my MPG has gotten pretty bad now". __________________ 2023 Subaru BRZ Limited - 6MT (weekend) 2013 Scion FR-S - 6MT (daily)

02-16-2023, 11:03 PM	#17
jongers Senior Member Join Date: Dec 2019 Drives: 19 86, 22 BRZ Location: CA Posts: 102 Thanks: 220 Thanked 130 Times in 55 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	In car calculations w/ 255 tires: gen 1 w/ updated diff ratio (17+) - 28.9 gen 2 - 25.9 __________________ Build Thread

02-19-2023, 10:15 AM	#18
vindiesel Senior Member Join Date: Nov 2022 Drives: 2023 brz limited 6mt red Location: Greenville sc Posts: 177 Thanks: 153 Thanked 141 Times in 73 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	My 2023 6mt High 20’s mpg hand calculated 90% hwy @75mph-80. I’m sure 60-70 would be at 30-32mpg on flat road. There has been allot of people shitting on its mpg estimates… but it easily exceeds dealer sticker mpg. Since the 2nd Gen is essentially equivalent to a 1st Gen. supercharged on low boost I would say the increased power output and mpg combo is a very optimistic expectation. __________________ 2023 brz red limited 6mt 10k miles ish 2009 Chrysler 5.7l hemi eagle 300c heritage edition 205k miles

03-13-2023, 02:24 PM	#24
OkieSnuffBox Senior Member Join Date: Aug 2014 Drives: '23 BRZ Limited Location: OKC, OK Posts: 1,997 Thanks: 665 Thanked 1,238 Times in 709 Posts Mentioned: 9 Post(s) Tagged: 1 Thread(s)	To be honest, I didn't pay attention in my first gen......new to 36k miles. I haven't paid in attention in my 2nd gen.........new to 1100 miles. __________________ "95% of the time, more throttle is the answer. 5% of the time, it ends the suspense."

03-13-2023, 03:44 PM	#26
vindiesel Senior Member Join Date: Nov 2022 Drives: 2023 brz limited 6mt red Location: Greenville sc Posts: 177 Thanks: 153 Thanked 141 Times in 73 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Sold my brz; I couldn’t afford the gas. It was 3mpg less than I thought (I’m waiting to hear this about any sports car. More hp trq and close to same gearing from the first gen would theoretically net the same or higher mpg… the difference in fuel is a Taco Bell quesadilla worth either you get the shits or you smile. __________________ 2023 brz red limited 6mt 10k miles ish 2009 Chrysler 5.7l hemi eagle 300c heritage edition 205k miles

03-12-2023, 01:33 AM	#19
Lelandjt Senior Member Join Date: Mar 2020 Drives: '04 STi, '12 Mazda 3 Hatch Location: Breckenridge, CO Posts: 380 Thanks: 30 Thanked 122 Times in 89 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I don't get why these cars get such low MPG in highway cruising. My Mazda 3 probably has more air drag, weighs the same, has a 2.0L, and similar gearing. It gets high 40s when cruising at 70mph. Seems like this car should get 40mpg.

03-12-2023, 04:36 AM	#20
ACT86 Senior Member Join Date: May 2021 Drives: English, French, Swedish & Japanese Location: Canberra Posts: 176 Thanks: 262 Thanked 149 Times in 61 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Only had my Gen 2 for a week or so, but covered quite a few ks. Economy seems near identical to my 2017 GTS so far.

03-13-2023, 05:26 PM	#27
AK2112 Senior Member Join Date: Oct 2021 Drives: 22 BRZ Location: Chicago Posts: 212 Thanks: 206 Thanked 130 Times in 80 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	added up my gas receipts for the first year with the car daily commute is 18 miles round trip of suburban driving. car rarely sees the highway.

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