93 Octane? - Page 9 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Grimlock · 03-12-2012, 08:12 PM

A picture I took of the pre-production BRZ at the local dealer.

tranzformer · 03-12-2012, 08:17 PM

Quote:

Originally Posted by Grimlock

A picture I took of the pre-production BRZ at the local dealer.

Didn't you already post that back a few pages? lol

http://www.ft86club.com/forums/showp...3&postcount=76

Grimlock · 03-12-2012, 08:52 PM

Quote:

Originally Posted by tranzformer

Didn't you already post that back a few pages? lol

http://www.ft86club.com/forums/showp...3&postcount=76

I did, but it seems people are still speculating that this car may only require regular or mid-grade, when it is pretty obvious that premium fuel is going to be the minimum recommended octane.

serialk11r · 03-12-2012, 09:50 PM

Hold up, do any cars ever specify to use "plus" grade gas? Isn't it usually either premium or regular? At any rate, I expect them to state the minimum required octane rating, and the "93" here could be 93 RON, which in some places is considered "premium".

Draco-REX · 03-12-2012, 10:24 PM

Quote:

Originally Posted by Grimlock

I did, but it seems people are still speculating that this car may only require regular or mid-grade, when it is pretty obvious that premium fuel is going to be the minimum recommended octane.

People will always post without looking at all the information out there. There's no speculation involved, it's already official that the car will require 93 Octane, as stated by SoA itself. But people don't pay attention, and hence this pointless speculation and people being just outright wrong.

serialk11r · 03-12-2012, 10:28 PM

Quote:

Originally Posted by Draco-REX

People will always post without looking at all the information out there. There's no speculation involved, it's already official that the car will require 93 Octane, as stated by SoA itself. But people don't pay attention, and hence this pointless speculation and people being just outright wrong.

It's not pointless, as you can probably tell a huge chunk of members here are from California where 93 octane gas does not exist.

tranzformer · 03-12-2012, 10:46 PM

Quote:

Originally Posted by Draco-REX

People will always post without looking at all the information out there. There's no speculation involved, it's already official that the car will require 93 Octane, as stated by SoA itself. But people don't pay attention, and hence this pointless speculation and people being just outright wrong.

Doubtful. Car will probably "require" 91. Not 93.

Draco-REX · 03-12-2012, 11:19 PM

Quote:

Originally Posted by serialk11r

It's not pointless, as you can probably tell a huge chunk of members here are from California where 93 octane gas does not exist.

91 is also the highest available in a few other states as well. The FA20 will likely run fine on 91, but will probably pull timing more often. Some real octane booster (that increases rating, not "points") might be recommended for any AutoX or Track weekend.

Quote:

Originally Posted by tranzformer

Doubtful. Car will probably "require" 91. Not 93.

Nothing doubtful about it. Stated in black and white in the sales brochure. No speculation needed.

tranzformer · 03-12-2012, 11:36 PM

^ I think that could very well be a typo based on it being Pre-production info. Much of US can only get 91. Makes no sense to require 93 if it isn't easily accessible.

Edit: Was looking at the WRX and STI requirement and it states 91 required and 93 recommended. I am wondering out loud if they meant something like that? I will wait until the owners manual is released for the final say. No matter what the marketing brochure says, it still does not make sense for 93 to be required.

serialk11r · 03-12-2012, 11:47 PM

Note the "15 inch brake calipers", someone mentioned how that's a Japanese measurement. In Japan they happen to use RON ratings for gas, go figure. If Mazda can get 12:1 CR with regular, it's possible this doesn't need premium. As I said before it's possible that the low speed cam advance is what requires extra knock resistance due to the high charge temperature due to EGR, and this engine may not have as aggressive low speed cam advances compared to the 2GR-FSE.

tranzformer · 03-12-2012, 11:53 PM

Quote:

Originally Posted by serialk11r

Note the "15 inch brake calipers", someone mentioned how that's a Japanese measurement. In Japan they happen to use RON ratings for gas, go figure. If Mazda can get 12:1 CR with regular, it's possible this doesn't need premium. As I said before it's possible that the low speed cam advance is what requires extra knock resistance due to the high charge temperature due to EGR, and this engine may not have as aggressive low speed cam advances compared to the 2GR-FSE.

Yup. 87/89/91 AKI (that we see at the pumps) is 91/93/95 RON. So if it is a typo it could be 89 based on AKI?

Want.FR-S · 03-13-2012, 01:00 AM

May I suggest a link from Wiki about the difference of RON and AKI?

http://en.wikipedia.org/wiki/Octane_...mber_.28RON.29

87 AKI is like 91-92 RON.
91 AKI is like 95 RON.
93 AKI is like 97 RON.

I don't know where 89 AKI is slotted in terms of RON, but it could be 93 or 94 RON.

But look at this line in the text:

"Premium" or "Super unleaded" gasoline in US (10% ethanol blend) 97 87-88 92-93

I think this is the one we should be filling in: the premium gasoline in US with 10% ethanol blend. That is rated at AKI 92-93 with RON 97. However, with regional difference you should be ok with AKI 91 premium fuel, like that in Cali.

tranzformer · 03-13-2012, 01:03 AM

Quote:

Originally Posted by Want.FR-S

May I suggest a link from Wiki about the difference of RON and AKI?

http://en.wikipedia.org/wiki/Octane_...mber_.28RON.29

87 AKI is like 91-92 RON.
91 AKI is like 95 RON.
93 AKI is like 97 RON.

I don't know where 89 AKI is slotted in terms of RON, but it could be 93 or 94 RON.

But look at this line in the text:

"Premium" or "Super unleaded" gasoline in US (10% ethanol blend) 97 87-88 92-93
I think this is the one we should be filling in: the premium gasoline in US with 10% ethanol blend. That is rated at AKI 92-93 with RON 97.

Look at my text above yours. I believe 93 RON is 89 AKI.

Want.FR-S · 03-13-2012, 01:08 AM

Quote:

Originally Posted by tranzformer

Look at my text above yours. I believe 93 RON is 89 AKI.

Yes indeed, but that 89 AKI is never called a *premium* fuel in any region, right?

03-12-2012, 11:36 PM	#121
tranzformer Delights in pure handling Join Date: Apr 2011 Drives: Zoom Zoom Location: KS Posts: 4,854 Thanks: 0 Thanked 15 Times in 14 Posts Mentioned: 1 Post(s)	^ I think that could very well be a typo based on it being Pre-production info. Much of US can only get 91. Makes no sense to require 93 if it isn't easily accessible. Edit: Was looking at the WRX and STI requirement and it states 91 required and 93 recommended. I am wondering out loud if they meant something like that? I will wait until the owners manual is released for the final say. No matter what the marketing brochure says, it still does not make sense for 93 to be required. Last edited by tranzformer; 03-12-2012 at 11:47 PM.

03-12-2012, 08:12 PM	#113
Grimlock Senior Member Join Date: Dec 2011 Drives: BRZ and NA Location: Annapolis, MD Posts: 878 Thanks: 46 Thanked 270 Times in 167 Posts Mentioned: 11 Post(s)	A picture I took of the pre-production BRZ at the local dealer.

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