MPG difference between MT/AT, realistic? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

eriktherod · 05-31-2012, 05:25 PM

I know that most cars that come in both AT/MT variants will have differing MPG ratings.

I remember my 08 Si got 21/29 for city/highway. The non-Si civics for the same year were marked at 25/36 and 26/34 for automatic and manual, respectively. I typically got 28-32 in my Si with mostly highway driving, and I usually had a good few moments of spirited driving.

So the FR-S is 22/30 in MT, and 25/34 in AT. I'm just curious how could the numbers be that different? I know that the transmissions for the manual vs auto are vastly different, and gearing is not as similar as other cars may be.

Any FR-S owners that have filled up and done the math yet of how they're faring on the MPG front? I'm set on getting the MT version this weekend, but I am curious about this aspect.

MTeator · 05-31-2012, 05:35 PM

I'd believe them, just seeing the RPM differences at highway speeds MT vs AT.

Sigh-on-Rice · 05-31-2012, 06:45 PM

I wonder why there is such a difference too because 86 w/ 17" rims in Japan is rated 12.4 km/L for both manual and automatic transmissions.

mattles · 05-31-2012, 07:14 PM

in the US Market the gear ratios for the FRS/BRZ are vastly different depending on which transmission you choose.

To summarize:
A/T has longer gears, 4th is 1:1 so 5/6 are both overdriven.
M/T has shorter gears, 5th is 1:1 so 6th is the only overdrive gear.

This will produce a varying difference in real world MPG between the 2 models, which will be more noticeable in highway cruising. In almost all situations the A/T FRS/BRZ will get better gas mileage.

ichitaka05 · 05-31-2012, 07:26 PM

Quote:

Originally Posted by eriktherod

I know that most cars that come in both AT/MT variants will have differing MPG ratings.

I remember my 08 Si got 21/29 for city/highway. The non-Si civics for the same year were marked at 25/36 and 26/34 for automatic and manual, respectively. I typically got 28-32 in my Si with mostly highway driving, and I usually had a good few moments of spirited driving.

So the FR-S is 22/30 in MT, and 25/34 in AT. I'm just curious how could the numbers be that different? I know that the transmissions for the manual vs auto are vastly different, and gearing is not as similar as other cars may be.

Any FR-S owners that have filled up and done the math yet of how they're faring on the MPG front? I'm set on getting the MT version this weekend, but I am curious about this aspect.

http://www.ft86club.com/forums/showthread.php?t=6099

Linseal · 05-31-2012, 08:03 PM

My MT is averaging at 25 right now.

Mari0 · 05-31-2012, 08:20 PM

If you are considering this car and are worried about mpg then maybe this is not the car for you... (not addressed to OP)

Allch Chcar · 05-31-2012, 11:15 PM

It's perfectly normal for the new EPA scores, it used to favor MTs before they change it in 2008. The Japan cycle show the same numbers for the GT '86.' While UK numbers favor the AT. But none of the scores are really realistic anyway.

http://toyota.jp/86/001_p_001/spec/spec/index.html

http://www.toyota.co.uk/cgi-bin/toyo...2-GT86-landing

Real world depends on how you drive. My experience with it is that the new EPA scores for ATs are optimistic while MTs are pessimistic. But your mileage may vary.

Khyron686 · 05-31-2012, 11:31 PM

My goal will be to avg under 20.

Allch Chcar · 05-31-2012, 11:33 PM

Quote:

Originally Posted by Mari0

If you are considering this car and are worried about mpg then maybe this is not the car for you... (not addressed to OP)

Actually, you have a point. This topic belongs in Tech not in General.

Mods if you please!

Moto-P · 06-01-2012, 02:26 AM

I'm averaging 26.7 in the last combined mpg over 600 miles or so. (AT)

Dave-ROR · 06-01-2012, 08:38 AM

I'm averaging 26.2 in the last 300 which includes a lot of city and load varying highway driving in a MT BRZ-L.

Turbowned · 06-01-2012, 11:31 AM

The mileage will go up as you put more miles on the car. I was averaging 19mpg in my new S4 when I first picked it up in January. My overall average over 8500 miles has risen to 22mpg. The car is rated at 18/27 for the 6MT; I average 30.5mpg when I go 80-ish miles down to Cape Cod once a week. YMMV, but I think we can do better than what the EPA estimates.

Boosted2.0 · 06-01-2012, 11:48 AM

Quote:

Originally Posted by Linseal

My MT is averaging at 25 right now.

Ditto, and I have beat on it pretty hard including 9 WOT dyno pulls and a ton of heavy throttle on the street.

I'm tickled pink.

05-31-2012, 05:35 PM	#2
MTeator First 86 Join Date: May 2012 Drives: 2013 Scion FR-S Location: Lexington, KY Posts: 303 Thanks: 14 Thanked 98 Times in 56 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I'd believe them, just seeing the RPM differences at highway speeds MT vs AT. __________________ Scion First 86 in Lexington KY - Firestorm 6MT - Delivered May 17, 2012 Mods: Motegi 17x7 TrakLites, BFG Rivals, K&N 33-2300 Filter, Nameless Perf. Track Pipe, TRD springs & rear bar, Hotchkis front bar (eh), Kask trailer hitch

05-31-2012, 07:14 PM	#4
mattles Proud of FR Layout Join Date: Jan 2012 Drives: 2013 Scion FR-S 6MT Location: Puget Sound, WA Posts: 984 Thanks: 101 Thanked 381 Times in 228 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	in the US Market the gear ratios for the FRS/BRZ are vastly different depending on which transmission you choose. To summarize: A/T has longer gears, 4th is 1:1 so 5/6 are both overdriven. M/T has shorter gears, 5th is 1:1 so 6th is the only overdrive gear. This will produce a varying difference in real world MPG between the 2 models, which will be more noticeable in highway cruising. In almost all situations the A/T FRS/BRZ will get better gas mileage. __________________ --Matt // Flickr \\ Instagram

06-01-2012, 08:38 AM	#12
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	I'm averaging 26.2 in the last 300 which includes a lot of city and load varying highway driving in a MT BRZ-L. __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

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05-31-2012, 11:31 PM	#9
Khyron686 Senior Member Join Date: Dec 2011 Drives: 2011 Outlander XLS, 2013 FR-S Blue Location: Calgary, Canada Posts: 634 Thanks: 129 Thanked 168 Times in 102 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	My goal will be to avg under 20.

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