I fucked up. Should I be worried? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SamuelDev · 11-03-2015, 09:44 AM

Hey folks, 2nd thread I'm posting today (other one pertains to winter storage)...

To make a long story short, I had 2000Km/1200miles worth of fun with the car before I read the manual front-to-back. This was a mistake. I didn't do anything wrong except, I had 87 fuel in the tank instead of 91. The manual recommends 91 as an absolute minimum (it's the highest I can get where I live unfortunately

).

Not that it makes the situation any better, but the clueless dealer told me any fuel type was fine.

Anyway, 1200 miles with the wrong fuel, did I ruin my engine or what? Should I be worried?

Parks_ · 11-03-2015, 09:50 AM

I ran on 87 fuel till around 9k miles and then I switched to 93. I haven't had any problems yet and I'm on 13k miles now.

cdq85 · 11-03-2015, 09:51 AM

you should try to find a lower octane. that is way too high for our car.

go_a_way1 · 11-03-2015, 09:51 AM

Quote:

Originally Posted by SamuelDev

Hey folks, 2nd thread I'm posting today (other one pertains to winter storage)...

To make a long story short, I had 2000Km/1200miles worth of fun with the car before I read the manual front-to-back. This was a mistake. I didn't do anything wrong except, I had 87 fuel in the tank instead of 91. The manual recommends 91 as an absolute minimum (it's the highest I can get where I live unfortunately

).

Not that it makes the situation any better, but the clueless dealer told me any fuel type was fine.

Anyway, 1200 miles with the wrong fuel, did I ruin my engine or what? Should I be worried?

OMG you car will explode now!!! haha.

I am sure it would be fine. modern cars can adjust the tune for bad gas. It will just not run as nice as it could but so long as it wasnt making any knocking sounds you should be fine.

MaximeT · 11-03-2015, 09:52 AM

The ECU will protect the engine. No problem. You were just lacking power and fuel efficiency.

ottoyu34 · 11-03-2015, 09:52 AM

Your mileage is probably terrible.

Damage is done, just move on. I won't stress over it.

Tcoat · 11-03-2015, 09:55 AM

No harm no foul. You will however really enjoy the increase in power and mileage that you will now get.

Speed2th · 11-03-2015, 09:56 AM

Knock sensor will retard the timing and lost some power to protect the engine, no harm done. Or you can always sdd octane booster into the fuel

MuseChaser · 11-03-2015, 10:26 AM

Quote:

Originally Posted by SamuelDev

Hey folks, 2nd thread I'm posting today (other one pertains to winter storage)...

To make a long story short, I had 2000Km/1200miles worth of fun with the car before I read the manual front-to-back. This was a mistake. I didn't do anything wrong except, I had 87 fuel in the tank instead of 91. The manual recommends 91 as an absolute minimum (it's the highest I can get where I live unfortunately

).

Not that it makes the situation any better, but the clueless dealer told me any fuel type was fine.

Anyway, 1200 miles with the wrong fuel, did I ruin my engine or what? Should I be worried?

You've likely done irreparable damage to the engine and the entire fuel system. The car is only good for parts now. I'll give you $3000 for it.

Just kidding... unless you wanna sell it for $3000 just 'cause I'm a GREAT guy. You're fine.. no worries.. enjoy your car.

Barry

Breeeep · 11-06-2015, 11:35 AM

Quote:

Originally Posted by cdq85

you should try to find a lower octane. that is way too high for our car.

Is there something wrong with 93 that I'm not aware of ?? Or is my sarcasm filter set too high ?

cdq85 · 11-06-2015, 12:28 PM

Quote:

Originally Posted by Breeeep

Is there something wrong with 93 that I'm not aware of ?? Or is my sarcasm filter set too high ?

yes turn that filter down. 87 will technically get the job done but 91 is recommended. I've never used anything other than 93 (as i'm sure a lot of other guys here will say as well) and everything seems smooth. 91 will be just fine for you.

fumanchu1 · 11-06-2015, 12:33 PM

Totaled, get the insurance to do a write-off

nova.86 · 11-06-2015, 07:00 PM

When I bought my HyperBlue, I told the dealership if they were going to fill it up with 91 "premium" and they said "Ohh nah these cars run 89, you don't need to get 91" I told them, I heard on the manual it asks for 91. and the guy was just like "it'll be okay, don't worry"

I already bought the car so I didn't want to give them shit about not putting 91, So I waited for it to get close to empty then filled up 91. I noticed an improvement in MPG and a slight increase in power. This is just my story, anyways you're fine. As long as you weren't putting it cheap 87 gas or lower from some shady gas station.

olsonpg · 11-06-2015, 08:24 PM

Every tank of 87 reduces the lifespan of your engine by about 15-20 %. Google the harmful effects of lesser octane fuel on a high compression engine. I would try and sell your car before its too late.

11-03-2015, 09:44 AM	#1
SamuelDev Member Join Date: Sep 2015 Drives: 2016 Subaru BRZ Limited Location: New Brunswick, Canada Posts: 24 Thanks: 1 Thanked 15 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I fucked up. Should I be worried? Hey folks, 2nd thread I'm posting today (other one pertains to winter storage)... To make a long story short, I had 2000Km/1200miles worth of fun with the car before I read the manual front-to-back. This was a mistake. I didn't do anything wrong except, I had 87 fuel in the tank instead of 91. The manual recommends 91 as an absolute minimum (it's the highest I can get where I live unfortunately ). Not that it makes the situation any better, but the clueless dealer told me any fuel type was fine. Anyway, 1200 miles with the wrong fuel, did I ruin my engine or what? Should I be worried?

11-03-2015, 09:52 AM	#6
ottoyu34 Senior Member Join Date: Oct 2015 Drives: Mazda3 Location: Toronto, Canada Posts: 126 Thanks: 47 Thanked 57 Times in 40 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Your mileage is probably terrible. Damage is done, just move on. I won't stress over it. __________________

11-03-2015, 09:55 AM	#7
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,286 Times in 46,456 Posts Mentioned: 2497 Post(s) Tagged: 50 Thread(s)	No harm no foul. You will however really enjoy the increase in power and mileage that you will now get. __________________ Racecar spelled backwards is Racecar, because Racecar.

11-06-2015, 08:24 PM	#14
olsonpg Senior Member Join Date: Jun 2015 Drives: BRZ. R34 GT-T Location: Calgary Posts: 762 Thanks: 737 Thanked 613 Times in 302 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Every tank of 87 reduces the lifespan of your engine by about 15-20 %. Google the harmful effects of lesser octane fuel on a high compression engine. I would try and sell your car before its too late. __________________ / SARD / ENKEI / GREDDY / RACESENG / CUSCO / PERRIN / KW / POWERED BY MAX / SPARCO / STOPTECH / BREMBO / ROCKET BUNNY / FULL-RACE twin scroll / OS GIKEN / WHITELINE

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11-03-2015, 09:50 AM	#2
Parks_ Member Join Date: Sep 2015 Drives: 2015 Steel Scion FR-S Location: Albertville, AL Posts: 13 Thanks: 0 Thanked 6 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I ran on 87 fuel till around 9k miles and then I switched to 93. I haven't had any problems yet and I'm on 13k miles now.

11-03-2015, 09:51 AM	#3
cdq85 Senior Member Join Date: Dec 2014 Drives: 2013 Raven FR-S Location: Greensburg, PA Posts: 249 Thanks: 107 Thanked 285 Times in 113 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	you should try to find a lower octane. that is way too high for our car.

11-06-2015, 12:33 PM	#12
fumanchu1 Senior Member Join Date: Sep 2015 Drives: 2013 Brz C38 (bought not built :P) Location: Gatineau, Qc, Canada Posts: 1,914 Thanks: 422 Thanked 1,249 Times in 802 Posts Mentioned: 8 Post(s) Tagged: 6 Thread(s)	Totaled, get the insurance to do a write-off

11-06-2015, 07:00 PM	#13
nova.86 Legendary Member Join Date: Aug 2015 Drives: HyperBlue BRZ Location: Oxnard, CA Posts: 365 Thanks: 138 Thanked 180 Times in 90 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	When I bought my HyperBlue, I told the dealership if they were going to fill it up with 91 "premium" and they said "Ohh nah these cars run 89, you don't need to get 91" I told them, I heard on the manual it asks for 91. and the guy was just like "it'll be okay, don't worry" I already bought the car so I didn't want to give them shit about not putting 91, So I waited for it to get close to empty then filled up 91. I noticed an improvement in MPG and a slight increase in power. This is just my story, anyways you're fine. As long as you weren't putting it cheap 87 gas or lower from some shady gas station.

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