Causes of Very High Fuel Consumption? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

exittoexist · 01-22-2020, 06:16 AM

Hi all,
I own a 2012 Toyota GT86 and since i bough the car i am experiencing very high fuel consumption.

16 lt /100 km city driving
10 lt / 100 km highway driving
20 lt /100km if i joy-drive it.

When i check my momentary fuel consumption it is 50lt when i floor the gas, and it is 20lt during slow traffic driving.

There is nothing wrong with the car while i am driving it.
The car is in stock condition as well.
Do you have any suggestions on what can cause this much of a consumption?

Any help will be appreciated. Thanks!

Tcoat · 01-22-2020, 06:21 AM

Quote:

Originally Posted by exittoexist

Hi all,
I own a 2012 Toyota GT86 and since i bough the car i am experiencing very high fuel consumption.

16 lt /100 km city driving
10 lt / 100 km highway driving
20 lt /100km if i joy-drive it.

When i check my momentary fuel consumption it is 50lt when i floor the gas, and it is 20lt during slow traffic driving.

There is nothing wrong with the car while i am driving it.
The car is in stock condition as well.
Do you have any suggestions on what can cause this much of a consumption?

Any help will be appreciated. Thanks!

Don't use the real time usage gauge. It is meaningless. Reset your average gauge and leave it alone for a couple of weeks and you will get a more realistic number.

Boomerang · 01-22-2020, 06:26 AM

Quote:

Originally Posted by exittoexist

Hi all,
I own a 2012 Toyota GT86 and since i bough the car i am experiencing very high fuel consumption.

16 lt /100 km city driving
10 lt / 100 km highway driving
20 lt /100km if i joy-drive it.

When i check my momentary fuel consumption it is 50lt when i floor the gas, and it is 20lt during slow traffic driving.

There is nothing wrong with the car while i am driving it.
The car is in stock condition as well.
Do you have any suggestions on what can cause this much of a consumption?

Any help will be appreciated. Thanks!

What is your average? Should be around 7-9L/100km

exittoexist · 01-22-2020, 07:32 AM

My average at car computer is 12lt/100km, however my real consumption is 16lt/100 km in city driving (which includes short periods of highway)
Meaning when i purchase 15lt of petrol, the gas is finished after 90km of driving

What do you guys think the problem might be?

Boomerang · 01-22-2020, 07:36 AM

Quote:

Originally Posted by exittoexist

My average is 12lt/100km, however my real consumption when is 16lt/100 km in city driving (which includes short periods of highway)

What do you guys think the problem might be?

Sorry, will edit that.

12l/100km average is high fuel consumption.

You either drive aggressively always or you have another issue.

exittoexist · 01-22-2020, 08:12 AM

Quote:

Originally Posted by Boomerang

Sorry, will edit that.

12l/100km average is high fuel consumption.

You either drive aggressively always or you have another issue.

The 16l/100km is during non-aggresive driving.
The consumption jumps to 20l/100km during aggresive driving

Ingen · 01-22-2020, 08:36 AM

Stop checking the gauge, and get out your calculator. Fill all the way up, drive till you need to fill up again, and then divide # km by # liters you put in to fill all the way up.

Do that a few times and check your gauge. Unless your engine is magically bigger than everyone else's, or your exhaust REEKS of unburnt gas, the gauge is probably just wrong.

Sasquachulator · 01-22-2020, 10:06 AM

Factors that can eat gas:
-Lots of stop and go traffic
-more city than highway
-Redlining the thing at every and all opportunity possible
-cruising at 4k+ rpm

But even still the mileage seems excessively high....was it a used car or a new one?

Tcoat · 01-22-2020, 10:54 AM

Quote:

Originally Posted by exittoexist

The 16l/100km is during non-aggresive driving.
The consumption jumps to 20l/100km during aggresive driving

How often do you reset the average gauge?

exittoexist · 01-22-2020, 01:49 PM

Quote:

Originally Posted by Tcoat

How often do you reset the average gauge?

Hey, these values are my actual calculations.
The computer hasn't been reset for 2 weeks (showing 12lt because thanks to highway driving)

Tcoat · 01-22-2020, 01:54 PM

Quote:

Originally Posted by exittoexist

Hey, these values are my actual calculations.
The computer hasn't been reset for 2 weeks (showing 12lt because thanks to highway driving)

OK. I just have a very hard time believing it is even possible to get that sort of mileage. You would have to have fuel pissing out of the car someplace.

Grady · 01-22-2020, 04:05 PM

Quote:

Originally Posted by exittoexist

Do you have any suggestions on what can cause this much of a consumption?

Your right foot!

Other things are your engine is running rich or your brother is stealing your gas while you sleep.

davesrave · 01-22-2020, 07:23 PM

Yeah, at that consumption level, you would smell it. Do you?

Decep · 01-22-2020, 07:25 PM

That's like 12mpg. Even driving like an asshole all the time i couldn't manage that

01-22-2020, 06:16 AM	#1
exittoexist Junior Member Join Date: Dec 2019 Drives: brz Location: eu Posts: 6 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Causes of Very High Fuel Consumption? Hi all, I own a 2012 Toyota GT86 and since i bough the car i am experiencing very high fuel consumption. 16 lt /100 km city driving 10 lt / 100 km highway driving 20 lt /100km if i joy-drive it. When i check my momentary fuel consumption it is 50lt when i floor the gas, and it is 20lt during slow traffic driving. There is nothing wrong with the car while i am driving it. The car is in stock condition as well. Do you have any suggestions on what can cause this much of a consumption? Any help will be appreciated. Thanks!

01-22-2020, 08:36 AM	#7
Ingen Senior Member Join Date: Oct 2012 Drives: Ultramarine FR-S 6MT Location: Columbus, OH Posts: 525 Thanks: 349 Thanked 204 Times in 121 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Stop checking the gauge, and get out your calculator. Fill all the way up, drive till you need to fill up again, and then divide # km by # liters you put in to fill all the way up. Do that a few times and check your gauge. Unless your engine is magically bigger than everyone else's, or your exhaust REEKS of unburnt gas, the gauge is probably just wrong. __________________ Car Received: 10/18. Break in ended: 10/28 Goal: Openflash UEL headers, Stage II 93 oct, TRD intake, arm rest :P

01-22-2020, 07:25 PM	#14
Decep Senior Member Join Date: May 2017 Drives: 2013 FR-S Series 10 Location: CA Posts: 1,073 Thanks: 172 Thanked 497 Times in 326 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	That's like 12mpg. Even driving like an asshole all the time i couldn't manage that __________________ 2013 FR-S 10 Series ~75k (SOLD) RCE SS-1 Coilovers Corsa Catback Edelbrock Supercharger installed @ 50k

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01-22-2020, 07:32 AM	#4
exittoexist Junior Member Join Date: Dec 2019 Drives: brz Location: eu Posts: 6 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	My average at car computer is 12lt/100km, however my real consumption is 16lt/100 km in city driving (which includes short periods of highway) Meaning when i purchase 15lt of petrol, the gas is finished after 90km of driving What do you guys think the problem might be?

01-22-2020, 10:06 AM	#8
Sasquachulator Pavement Grey Join Date: Dec 2011 Drives: 2020 Toyota 86 GT, 2017 BMW X1 Location: Calgary Posts: 3,084 Thanks: 109 Thanked 2,223 Times in 1,205 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Factors that can eat gas: -Lots of stop and go traffic -more city than highway -Redlining the thing at every and all opportunity possible -cruising at 4k+ rpm But even still the mileage seems excessively high....was it a used car or a new one?

01-22-2020, 07:23 PM	#13
davesrave Senior Member Join Date: Apr 2011 Drives: 2014 Boxster S; 2015 Macan S Location: MA Posts: 206 Thanks: 326 Thanked 233 Times in 63 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Yeah, at that consumption level, you would smell it. Do you?

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