Fuel Economy with OFT? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Keenercarguy · 03-18-2016, 11:13 PM

Hey everyone. I'm looking for anecdotes from people regarding fuel consumption with the various base tunes for the Openflash Tablet. (Not including E85, I know that E85 is about 75% as economical as 93.)
Lemme know what your engine mods are with your anecdotes please!
I'm looking at buying an OFT to hold me over until I get flex fuel through ecutek in a year or two. However: I'm going to be doing a LOT of highway miles over the summer and want to know whether or not I'm going to need to flash back to stock tune to save gas. I am on the stock header.

Wayno · 03-18-2016, 11:30 PM

While cruising AVCS, timing, fuel, etc are the same as stock.
At WOT you get more power for less fuel, depending on the car.
Everywhere else in between you get slightly better efficiency.

ryoma · 03-18-2016, 11:44 PM

MPG will also depend on your driving style and mods you have on your car. after I got my sticky summer tires, I noticed that my MPG dropped from 29 MPG to 27-28 MPG. if you have a real front splitter and rear diffuser (like Velox) you will also gain MPG (Velox has a thread about it).

as for just changing tunes, I didn't really notice any difference from my stage 1 OFT to stage 2 tune (with headers and overpipe installed). I do a mix of freeway and city driving though, and never a full tank purely freeway so I truly don't know what my real freeway MPG is

menikmati · 03-19-2016, 12:55 PM

I average 30-32 MPG on a Stage 1 91 octane tune. 90% of my driving is highway going around 70 MPH.

On the stock tune with 100% highway I managed to get 35 MPG.

MT also.

Captain · 03-21-2016, 12:27 AM

Stock - 28 mpg

Stage 2 UEL 91oct - 26.2 mpg

steve99 · 03-21-2016, 03:23 AM

Quote:

Originally Posted by Keenercarguy

Hey everyone. I'm looking for anecdotes from people regarding fuel consumption with the various base tunes for the Openflash Tablet. (Not including E85, I know that E85 is about 75% as economical as 93.)
Lemme know what your engine mods are with your anecdotes please!
I'm looking at buying an OFT to hold me over until I get flex fuel through ecutek in a year or two. However: I'm going to be doing a LOT of highway miles over the summer and want to know whether or not I'm going to need to flash back to stock tune to save gas. I am on the stock header.

OFT guys have flex fuel system working thanks to ztan, not sure when it will be released to public ask the oft guys

Celadrielas · 03-26-2016, 05:26 PM

I am running the following mods:

AEM Intake (not using AEM chip)
Raceseng light weight crank
JDL UEL header
2.5" Spec D exhaust

My MPG is in flux between 32 mpg with some spirited driving during daily driving. to 37 MPG hyper-miling on a stock tune.

Since my OFT, I am 32.8 - 36.7 mpg on avg

Rougenite · 03-27-2016, 08:18 PM

I must be doing something wrong. I average 24 and some change. Stock except stage 1.

housecat · 03-28-2016, 03:27 AM

My Average MPG
All stock: 29.0
OFH + Stg2 UEL 91oct: 28.0

https://docs.google.com/spreadsheets...P78/edit#gid=0

Jollyyy · 05-12-2017, 01:52 PM

Quote:

Originally Posted by Rougenite

I must be doing something wrong. I average 24 and some change. Stock except stage 1.

Mine is about the same. Do you let your car warm up before driving? I think it is still counting the fuel consumed and the 0 miles it went so it drops the average quite a lot .

strat61caster · 05-12-2017, 02:32 PM

Quote:

Originally Posted by Rougenite

I must be doing something wrong. I average 24 and some change. Stock except stage 1.

Drive cycle is more important than anything else, likely nothing is wrong with your car, you just sit in traffic or at stop lights/signs more than most people in this thread.

My mileage plummeted not when I changed tires or tuned it, but when I moved, no more freeway cruising meant I went from a ~28 mpg average down to ~24 mpg, but I cut 40 miles off my commute every day.

I just put OFT on my car, but I don't expect that to change that I get 10mpg while tracking or autox-ing or >30 mpg cruise control on down the freeway without traffic.

Quote:

Originally Posted by Jollyyy

Mine is about the same. Do you let your car warm up before driving? I think it is still counting the fuel consumed and the 0 miles it went so it drops the average quite a lot .

Yes it does count fuel being used while not moving, so sitting in dead stop traffic you're lowering your average. But sitting in the car letting it warm up for 2 minutes is nothing compared to sitting in 15 mph traffic for an hour or setting cruise control at 65.

If anyone doesn't believe me, reset your average fuel gauge, drive around the block, (<1 mile) then stop and let it idle and watch that number drop like a rock.

wparsons · 05-12-2017, 04:15 PM

I get in the 6.5-7.0 L/100km range in pure highway driving, 225 AD08R's, K&N panel filter, Perrin 2.5" catted front pipe, 2.5" resonated cat-back and OFT stage 1 93.

Your mileage is going to be more affected by wider/stickier tires than the tune.

Impureclient · 05-13-2017, 01:08 AM

k&n drop in filter
lightweight pulley set
uel header & OP
oft stg 2

After the uel header and stg 2 tune, no change in mpg here. 100% city driving with very short fast trips under 5 minutes and occasional 15 minutes, I'm at 20-21 mpg. Highway driving I will still easily get into mid thirties.

guybo · 05-13-2017, 06:08 AM

I thought I was getting 30 MPG, because I was going with what the display reads. But I started doing the manual calculations every fill up.

70% highway driving. 28 MPG

-Injen intake
-gutted cats, Berk dual exit
-OFT stage 2 93

03-18-2016, 11:13 PM	#1
Keenercarguy Mountain Runner Join Date: Jan 2014 Drives: 2013 Subaru BRZ Limited 6MT Location: Boone, NC and Charlotte area NC Posts: 714 Thanks: 489 Thanked 142 Times in 105 Posts Mentioned: 8 Post(s) Tagged: 2 Thread(s)	Fuel Economy with OFT? Hey everyone. I'm looking for anecdotes from people regarding fuel consumption with the various base tunes for the Openflash Tablet. (Not including E85, I know that E85 is about 75% as economical as 93.) Lemme know what your engine mods are with your anecdotes please! I'm looking at buying an OFT to hold me over until I get flex fuel through ecutek in a year or two. However: I'm going to be doing a LOT of highway miles over the summer and want to know whether or not I'm going to need to flash back to stock tune to save gas. I am on the stock header. __________________ 2013 BRZ 6MT Limited: "Quick as Hell, on a Budget" Build • Ceramic Coated Gruppe-S UEL/OP • Konig Hypergrams • RS4 200tw • Koni Yellows, Eibach Springs • Ferodo DS2500's Last edited by Keenercarguy; 03-19-2016 at 09:06 PM. Reason: Correcting iPhone autocorrect-related errors

03-18-2016, 11:30 PM	#2
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	While cruising AVCS, timing, fuel, etc are the same as stock. At WOT you get more power for less fuel, depending on the car. Everywhere else in between you get slightly better efficiency. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

03-18-2016, 11:44 PM	#3
ryoma Senior Member Join Date: Mar 2015 Drives: 2015 Subaru BRZ Limited CWP Location: SoCal Posts: 1,561 Thanks: 34 Thanked 669 Times in 469 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	MPG will also depend on your driving style and mods you have on your car. after I got my sticky summer tires, I noticed that my MPG dropped from 29 MPG to 27-28 MPG. if you have a real front splitter and rear diffuser (like Velox) you will also gain MPG (Velox has a thread about it). as for just changing tunes, I didn't really notice any difference from my stage 1 OFT to stage 2 tune (with headers and overpipe installed). I do a mix of freeway and city driving though, and never a full tank purely freeway so I truly don't know what my real freeway MPG is __________________ My 2015 CWP BRZ Build

03-26-2016, 05:26 PM	#7
Celadrielas Senior Member Join Date: Mar 2014 Drives: 2013 Asphalt Fr-S Location: Earth Posts: 850 Thanks: 535 Thanked 378 Times in 248 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	I am running the following mods: AEM Intake (not using AEM chip) Raceseng light weight crank JDL UEL header 2.5" Spec D exhaust My MPG is in flux between 32 mpg with some spirited driving during daily driving. to 37 MPG hyper-miling on a stock tune. Since my OFT, I am 32.8 - 36.7 mpg on avg __________________ "That's the beatiful thing about life! No matter how filthy something gets, you can always clean it right up."

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03-19-2016, 12:55 PM	#4
menikmati Senior Member Join Date: Nov 2013 Drives: 2015 BRZ, 2005 STI Location: San Diego, CA Posts: 335 Thanks: 228 Thanked 225 Times in 118 Posts Mentioned: 3 Post(s) Tagged: 2 Thread(s)	I average 30-32 MPG on a Stage 1 91 octane tune. 90% of my driving is highway going around 70 MPH. On the stock tune with 100% highway I managed to get 35 MPG. MT also.

03-21-2016, 12:27 AM	#5
Captain Member Join Date: Sep 2015 Drives: 15' Raven FR-S Location: Bay Area Posts: 75 Thanks: 0 Thanked 4 Times in 4 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Stock - 28 mpg Stage 2 UEL 91oct - 26.2 mpg

03-27-2016, 08:18 PM	#8
Rougenite Senior Member Join Date: Dec 2012 Drives: Raven FR-S Location: San Antonio, Texas Posts: 286 Thanks: 17 Thanked 36 Times in 30 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I must be doing something wrong. I average 24 and some change. Stock except stage 1.

05-13-2017, 01:08 AM	#13
Impureclient Banned Join Date: May 2015 Drives: 2015 FR-S Location: NPR, Florida Posts: 2,404 Thanks: 1,802 Thanked 2,903 Times in 1,282 Posts Mentioned: 25 Post(s) Tagged: 2 Thread(s)	k&n drop in filter lightweight pulley set uel header & OP oft stg 2 After the uel header and stg 2 tune, no change in mpg here. 100% city driving with very short fast trips under 5 minutes and occasional 15 minutes, I'm at 20-21 mpg. Highway driving I will still easily get into mid thirties.

05-13-2017, 06:08 AM	#14
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	I thought I was getting 30 MPG, because I was going with what the display reads. But I started doing the manual calculations every fill up. 70% highway driving. 28 MPG -Injen intake -gutted cats, Berk dual exit -OFT stage 2 93

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