4AFE uses 91 octane? - Toyota Nation Forum : Toyota Car and Truck Forums

JasonK94Z · 09-03-2009, 06:28 PM

Did I read this right? 91 octane required for the 4AFE engine? Been running 87 octane for the entire life of the car. Its a 92 Geo Prizm btw.

freakinbox · 09-03-2009, 07:04 PM

the 4afe didn't, the small port 4age did!

SuperRA · 09-03-2009, 07:28 PM

Yea, it would be a total waste on a 4AFE. In fact, I run 87 in my smallport 4AGE just fine. I don't run it hard tho, just normal.

Where did you read this information?

***REN69*** · 09-03-2009, 09:16 PM

The Prizm GSi came with the 4AGE... which yeah in 1990 and up would've been a smallport 4AGE.

4agetercel · 09-04-2009, 01:19 AM

Quote:

Originally Posted by REN69

The Prizm GSi came with the 4AGE... which yeah in 1990 and up would've been a smallport 4AGE.

never mind, answered my own question lol

JasonK94Z · 09-04-2009, 07:50 AM

I read it on Autozones how to's and info. I suppose i missed the part about Vin code 6 in the description. I was tired yeasterday.

***REN69*** · 09-04-2009, 01:03 PM

So I'm assuming it's not a GSi correct? if it's not then you're fine.

JasonK94Z · 09-04-2009, 07:11 PM

No, its the basic LSi.

Bitter · 09-06-2009, 11:41 AM

it uses 91 RON which is 87 PON, japan uses RON not PON which is the average of RON and MON ratings.
http://en.wikipedia.org/wiki/Octane_rating

Quote:

Because of the 8 to 10 point difference noted above, the octane rating shown in the United States is 4 to 5 points lower than the rating shown elsewhere in the world for the same fuel. See the table in the following section for a comparison.