follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Delicious Tuning
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Scion FR-S Forum | Subaru BRZ Forum | Toyota 86 GT 86 Forum | AS1 Forum - FT86CLUB > Scion FR-S / Toyota 86 > Scion FR-S / Toyota 86 GT86 General Forum

Scion FR-S / Toyota 86 GT86 General Forum The place to start for the Scion FR-S / Toyota 86 | GT86


User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-13-2016, 03:44 PM   #15
Packofcrows
hey you, yeah you <3
 
Packofcrows's Avatar
 
Join Date: Jul 2012
Drives: 2014 37J FR-S
Location: Monterey County, CA
Posts: 2,694
Thanks: 877
Thanked 1,217 Times in 794 Posts
Mentioned: 38 Post(s)
Tagged: 3 Thread(s)
93 you'll notice bit more response and better mpg. Thats it. 91 it feels the same as 93 but with about 3-5mpg less. IMO

I only use Shell 91 or Chevron 91. No 93 in central CA
__________________
Got my TRD wheels and TRD louvers. Thanks!!!
Packofcrows is offline   Reply With Quote
Old 03-13-2016, 04:27 PM   #16
itsAlex
Senior Member
 
itsAlex's Avatar
 
Join Date: Jan 2016
Drives: 2016 4Runner / 2016 FR-S
Location: Brampton, Ontario
Posts: 127
Thanks: 18
Thanked 48 Times in 30 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Garage
I also use Shell 91, there's Esso 94 around here but as the manual says, 91 is minimum. It's not recommended, but it gets the job done safely. Besides, I rarely ever go above 3500 rpm, if it matters.
itsAlex is offline   Reply With Quote
Old 03-13-2016, 06:35 PM   #17
FR-Sky
Senior Member
 
FR-Sky's Avatar
 
Join Date: Dec 2015
Drives: 2013 FR-S 10 series [755]
Location: Bay Area, CA
Posts: 1,190
Thanks: 385
Thanked 388 Times in 263 Posts
Mentioned: 7 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by Tcoat View Post
Manual says: Recommended 93 Required minimum 91. All is good in the world.
Well,,they do have 100 near my area,,but its 10$ a gallon lol
FR-Sky is offline   Reply With Quote
Old 03-13-2016, 06:48 PM   #18
softgrip
Senior Member
 
Join Date: Dec 2015
Drives: 2017 BRZ - Dark Grey Metallic
Location: Melbourne, Australia
Posts: 244
Thanks: 241
Thanked 165 Times in 83 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Garage
I'm all about BP Ultimate. Every fillup for my WRX, and now the BRZ is getting the same loving.
softgrip is offline   Reply With Quote
Old 03-13-2016, 07:51 PM   #19
PureShield
Senior Member
 
PureShield's Avatar
 
Join Date: Jul 2015
Drives: 2013 Scion FR-S
Location: Vancouver, B.C
Posts: 189
Thanks: 139
Thanked 72 Times in 50 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by itsAlex View Post
I also use Shell 91, there's Esso 94 around here but as the manual says, 91 is minimum. It's not recommended, but it gets the job done safely. Besides, I rarely ever go above 3500 rpm, if it matters.
Except that's based off of American 91 octane not Canadian 91. Canadian 91 is more like 87-89 American.
PureShield is offline   Reply With Quote
Old 03-13-2016, 08:03 PM   #20
retoocs
Senior Member
 
Join Date: May 2013
Drives: BRZ
Location: Sacramento, CA
Posts: 168
Thanks: 2
Thanked 61 Times in 43 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by mdm View Post
And cleaners/detergents are a separate issue, they are about preventing/removing carbon buildup in the intake system, especially on intake valves (unless the engine uses direct injection, then of course fuel detergents can't clean the intake valves because the valves do not come into contact with fuel).

Cleaning capability is per se indepent of octane rating, though some brands put more cleaners in their premium (high octane) fuels.

Cleaners/detergents also have no effect on HP, at least not directly. I mean, if there were no or insufficient cleaners, gradually carbon buildup would interfere with engine operation and reduce HP, but that's not the effect the OP has in mind, I suppose.

All gasoline is supposed to contain cleaners, there are standards for that. But - at least in the US - some gas brands set their own higher standards: "Top Tier" gas.
Not all direct injection have the injectors only in the combustion chamber. The D-4S system in the 86's have a port injector too.

Cleaners/detergents and other additives do affect hp. The additives doesn't contribute to producing power. Most gasoline around the country is about 97% so you are losing about 6 hp over getting 100% gasoline.
retoocs is offline   Reply With Quote
The Following User Says Thank You to retoocs For This Useful Post:
V_86 (03-14-2016)
Old 03-13-2016, 08:12 PM   #21
mdm
not a twin owner
 
mdm's Avatar
 
Join Date: Jan 2016
Drives: 2016 Veloster Turbo DCT
Location: Northern Virginia, USA
Posts: 734
Thanks: 992
Thanked 463 Times in 267 Posts
Mentioned: 7 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by retoocs View Post
Not all direct injection have the injectors only in the combustion chamber. The D-4S system in the 86's have a port injector too.

Sure, I should have said "unless the engine uses only direct injection"
mdm is offline   Reply With Quote
Old 03-13-2016, 08:25 PM   #22
Tcoat
He who smelt it...
 
Tcoat's Avatar
 
Join Date: Jul 2014
Drives: 14 FRS Hot Lava
Location: London, Ont
Posts: 58,128
Thanks: 51,446
Thanked 82,664 Times in 37,023 Posts
Mentioned: 2118 Post(s)
Tagged: 49 Thread(s)
Quote:
Originally Posted by PureShield View Post
Except that's based off of American 91 octane not Canadian 91. Canadian 91 is more like 87-89 American.
No. Canadian octane is measured in AKI exactly the same as the US. So 91 here is exactly the same as 91 there. Don't know where you heard different.
__________________
Racecar spelled backwards is Racecar, because Racecar.
Tcoat is offline   Reply With Quote
The Following 2 Users Say Thank You to Tcoat For This Useful Post:
itsAlex (03-14-2016), mdm (03-13-2016)
Old 03-13-2016, 08:44 PM   #23
VTEC
Senior Member
 
Join Date: Mar 2015
Drives: Scion FR-S
Location: Toronto, CA
Posts: 133
Thanks: 20
Thanked 95 Times in 63 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by FR-Sky View Post
Well,,they do have 100 near my area,,but its 10$ a gallon lol
Well you don't have to fill the whole tank with 100, that would expensive and overkill. But you can mix 100 with 91 to get 93 octane. There's a chart posted somewhere on here by one of the California members that shows you how many gallons of each to mix in order to get whatever octane you are looking for.

But an easier way might be just to order a case of octane booster and add some to each fill up
__________________
Instagram: @racecar_4life
VTEC is offline   Reply With Quote
Old 03-13-2016, 08:54 PM   #24
PureShield
Senior Member
 
PureShield's Avatar
 
Join Date: Jul 2015
Drives: 2013 Scion FR-S
Location: Vancouver, B.C
Posts: 189
Thanks: 139
Thanked 72 Times in 50 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Tcoat View Post
No. Canadian octane is measured in AKI exactly the same as the US. So 91 here is exactly the same as 91 there. Don't know where you heard different.
My local clubs tuner at Drift Office has tuned and modified over 180 FR-S/BRZ's and has done extensive testing using Canadian 91/94 vs American 92 vs E85 and has shown that are gas is far inferior especially when dealing with a force-fed motor.
PureShield is offline   Reply With Quote
The Following User Says Thank You to PureShield For This Useful Post:
DriftinFRS (05-04-2016)
Old 03-13-2016, 09:03 PM   #25
Tcoat
He who smelt it...
 
Tcoat's Avatar
 
Join Date: Jul 2014
Drives: 14 FRS Hot Lava
Location: London, Ont
Posts: 58,128
Thanks: 51,446
Thanked 82,664 Times in 37,023 Posts
Mentioned: 2118 Post(s)
Tagged: 49 Thread(s)
Quote:
Originally Posted by PureShield View Post
My local clubs tuner at Drift Office has tuned and modified over 180 FR-S/BRZ's and has done extensive testing using Canadian 91/94 vs American 92 vs E85 and has shown that are gas is far inferior especially when dealing with a force-fed motor.
Then they better get that info to the government. They can blow the whole highly regulated and monitored fuel industry away.
__________________
Racecar spelled backwards is Racecar, because Racecar.
Tcoat is offline   Reply With Quote
Old 03-13-2016, 09:05 PM   #26
Tcoat
He who smelt it...
 
Tcoat's Avatar
 
Join Date: Jul 2014
Drives: 14 FRS Hot Lava
Location: London, Ont
Posts: 58,128
Thanks: 51,446
Thanked 82,664 Times in 37,023 Posts
Mentioned: 2118 Post(s)
Tagged: 49 Thread(s)
Quote:
Originally Posted by VTEC View Post
Well you don't have to fill the whole tank with 100, that would expensive and overkill. But you can mix 100 with 91 to get 93 octane. There's a chart posted somewhere on here by one of the California members that shows you how many gallons of each to mix in order to get whatever octane you are looking for.

But an easier way might be just to order a case of octane booster and add some to each fill up
Why? Unless you are going to tune for it higher octane than 93 does nothing at all for you.
__________________
Racecar spelled backwards is Racecar, because Racecar.
Tcoat is offline   Reply With Quote
Old 03-13-2016, 09:10 PM   #27
PureShield
Senior Member
 
PureShield's Avatar
 
Join Date: Jul 2015
Drives: 2013 Scion FR-S
Location: Vancouver, B.C
Posts: 189
Thanks: 139
Thanked 72 Times in 50 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Tcoat View Post
Then they better get that info to the government. They can blow the whole highly regulated and monitored fuel industry away.
Haha I don't personally know @Tcoat I'm just relaying the info. I've read different things all over the internet and heard different things in person. I've also read that American gas stations can put lower rated numbers on the pump than what the fuel may actually be and that the sign on the pump is just the lowest of what you may get???? Who knows.
PureShield is offline   Reply With Quote
The Following 2 Users Say Thank You to PureShield For This Useful Post:
DriftinFRS (05-04-2016), Tcoat (03-13-2016)
Old 03-13-2016, 09:16 PM   #28
Hotrodheart
Senior Member
 
Hotrodheart's Avatar
 
Join Date: Jan 2014
Drives: 2013 Scion FR-S
Location: Kailua-Kona HI
Posts: 401
Thanks: 46
Thanked 427 Times in 181 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Tcoat View Post
How is this even a question? read the manual. It will tell you what you should and must use.
The octane levels are for reducing knock ONLY! Higher octane fuel does not give you more power really. What it does is allows the engines with learning ECUs to adjust the timing higher. This is where the "more power" is created.
As a society that identifies higher numbers as being stronger or better I think many people totally misunderstand octane rating. High octane fuel is intended to reduce preignition in high compression engines it is not stronger or better than low octane fuel in any other way. To grossly over simplify what is happening the higher the octane fuel the harder it is to ignite not the other way around. Sure you can run high octane in a regular engine but it is not doing a single thing for you. You should not run lower octane in a high compression engine though since you run the risk of damage. New engines with self adjusting timing this risk is not huge but run too low in an older engine and you better be good at fixing it.
@tcoat how does it run on maple syrup?
Hotrodheart is offline   Reply With Quote
The Following 2 Users Say Thank You to Hotrodheart For This Useful Post:
imaguitar (03-15-2016), Tcoat (03-13-2016)
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Gas Premium or regular? Dragon86 Scion FR-S / Toyota 86 GT86 General Forum 315 06-20-2017 10:14 PM
Subaru Premium BRZ 86 & Premium Proud of Boxer Catalog & Broshure keioffice Miscellaneous 0 03-14-2014 08:10 AM
Shell URT Advanced / / Sonoco 260GTX // Race Fuels BC-Boy Engine, Exhaust, Transmission 2 03-11-2014 10:12 AM
Delicious Tuning: EcuTeK Stage 1 or 2 on 91, 93 or E85 fuels DeliciousTuning Engine, Exhaust, Bolt-Ons 1 09-19-2013 05:58 PM
use regular gas? Sirnice Scion FR-S / Toyota 86 GT86 General Forum 85 09-29-2012 08:25 AM


All times are GMT -4. The time now is 01:20 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Garage vBulletin Plugins by Drive Thru Online, Inc.