2007 Sedan Manual

Page 9-2 shows a table with Recommended Fuel Specifications:
"Unleaded gasoline with an octane rating of at least 91 AKI (RON 96)"

Page 9-3 Fuel Recommendation:
"Infiniti recommends the use of premium unleaded gasoline with an octane rating of at least 93 AKI (Anti-Knock Index) number (Research octane number 98)

If unleaded premium gasoline is not available, you may use regular unleaded gasoline with an octane rating of at least 87 AKI number (Research octane number 91), but you may notice a decrease in performance)"

So which is it? 91? 93?

AKI is the number thats on the majority of U.S. pumps.
http://en.wikipedia.org/wiki/Octane_rating

 

interesting observation

But I think it's a moot point because most states either have 91 or 93, not both. I know we get delicious 93 octane in Texas, but the Cali guys can only get 91

 

Yeah I've been reading that most of Cali only offers 91.
I'm in Southwest Florida where all gas stations offer 93.
But I'm noticing lately that some 7-11's are starting to offer 91.
All the posts say that 91 is minimum.
But after reading the manual, I'm not so sure.
It appears that 93 is the minimum recommendation.

Am I wrong?

 

you can run 87 but its going to back your timing wayyy off to prevent detination. 91 is fine.

 

my main gas station by my house has 89, 91, 93, 95

 

Where do you live?
What octane do you put in?

 

Looks like a misprint to me. "Premium unleaded" is considered at least 91 octane anyway. If 93 is available go with that, but 91 is fine too.

 

98 octane here xD

 

thanks for rubbing it in sigh

 

I used to live close to Lowes Motor Speedway in NC and there were a bunch of stations nearby that had 100+ octane at the pump... Wonder how that would work , though I never had the stones to try it...

 

I'm wondering if using 91 vs. 93 has any long term effects on the engine or parts.

 

I am in Cali in the North Hollywood area and there are some gas stations that offer high octane like 101, but since cali doesnt realy get higher octane than 91 in large quantities a gallon of this is around $8

And I've heard something about fuel ratings varying between here and europe. What I heard was something like 91 here is 95 ish or so there because here they are more strict on rating gas. Not sure but could meen a lot.

 

http://en.wikipedia.org/wiki/Octane_rating
It has nothing to do with being stricter on rating gas.
Europe uses a rating system called (RON) Research Octane Number.
Same gas but the units result in a 4-5 point difference vs our Octane rating on U.S. pumps, Anti-Knock Index (AKI).

 

Ya bro I mest up, but i knew there was something like that. So the other question is, does the manuel say it in RON or AKI? and if we are set to run at 91 then is it right to advance our timing on the bullydog systems?

 

Read my initial post that quotes the manual verbatim.