What octane should be put into a 2nd gen N/A?

 

87 octane regular.
should cost you about $.65/L right now.
*wink*

 

is that standard spec ideal octane???

 

the cheapest **** you can get here... is more than you need for maximum power.

 

wo you back from the bushes sean?? or did you break into some bonie cabin with a phone line and computer LOL..

 

what about TII with a fat T04 turbo?

 

That's a joke right? Race gas if you can find it!

Steve

 

NAs dont need too high octanes, unless heavily modified.

Turbos on the other hand need as much octanes as possible, due to the higher temperatures (to avoid detonation). Over here we have 98 Oct, which is "SuperPlus", and now we also have Shell's "V-Power", which is 96 Oct, but also contains various engine cleaning products

 

Liter? What the heck is a liter?

And yes, 87 is fine for NA, 92/94 for a Turbo..

98?!!!!!!!!!!!!!!!

Good grief! I wish!

PaulC

 

Well, 98O is the maximum number of octanes, so it wouldnt be a surprise if it actually had 96 or 95...

 

For some perspective, here in the People's Republik, we only get 91.

Yes, 91. Yes, tha'ts lower than the MID grade some of you get.

@#%*

PaulC

 

Hehe we get 93 and 94 here. To hell with CA

 

yeah.... and we pay MORE than what you guys pay for your 92/94.

I'm gonna hit those jerks on the head with a torque wrench!

 

here get 92 and 94 here in BC

 

Ok Uncle Daddy

Paul

 

Not really. Tore my anterior ligament in my ankle, so WCB gave me three weeks off at 12 hours a day, 6 days a week, $18 an hour (about what I was making working).
I stay at camp, and every day get a ride into Vanderhoof with the camp maintenance guy and then truck back home.
I go to town for physio, but still have 6 or 7 hours to spend around the *city*.

 

A liter is what everyone in the world uses to measure fluid volume, except for good ol' America.

Most NA owners I've talked to don't seem to find a difference between 87 and higher grades (89,91, 94, 96, 101...etc)

I've found that I do notice performance differences when using 87 over 94. BOTH on my 89 TII and even on my 85 GSL-SE (13B NA EGI).

I also find 94 burns cleaner, and gets me better kpl (mpg).

/F/

 

Yep, which means that we're right, and everyone else is WRONG!

LOL

PaulC

 

You should always be using high octane fuel on your TII anyway, and your NA car will run faster on 87 octane fuel.
The "performance difference" with higher octane fuel on your NA is purely psychosomatic.

 

Same with the turbo cars. If using the highest octane available in your turbocharged car makes you feel better, then go ahead, but in most cases it's a waste of money. I don't suppose that any of you TII owners have bothered to look up the octane requirements in your owner's manual?

 

Aren't those minimum requirements?

Seperate octane question: In Japan, they have higer octane fuel correct? So if you buy a J-Spec, shouldn't you have to use a higher octane fuel like 91 with a booster??

 

good question.,.. I hadn't even thought of that... it's prolly another thing mentioned in the owners manual (of the j-spec car... which we don't have... )

 

Well, you have an 88 AE TII right? Just open up your glove box, flip through the owner's manual, and post what you find.

What does a "minimum" anti-knock requirement mean to you? For example, if 87 is the "minimum" octane required to keep the engine from detonating, what would be gained by using 91 octane? Would 91 yield even less detonation that you didn't have to begin with using the 87? How about 93 octane? Would that allow for even less, less, non-existent detonation than the 91 octane? Where does it end?

First of all, the manufacturer and/or engine tuners determine the specifications for their products, not the petroleum retailers. LOL, like autocrash said, you will need to check the J-spec specs, ask others what works, and/or figure it out for yourself. Secondly, the US uses a different method to determine the octane rating than most other countries, which causes the same fuel to be rated lower in the US. These are the basic types of octane ratings:
RON: Research Octane Number, based on normal engine operating conditions, this is the standard for most countries.
MON: Motor Octane Number, based on higher engine speeds and inlet temperatures, this is usually 6-12 points lower than the RON for the same fuel.
PON: Pump Octane Number, based on the formula (RON+MON)/2, which in English means an average of the two. This is the US standard, and you may have noticed a yellow label on the gas pump listing this formula.
SON: Supercharge Octane Number, which is a dual-rating for aviation fuel. The first rating is based on a supercharged engine at cruise, and the second rating is based on a supercharged engine at boost. The common avgas carries a 100/130 SON rating.

Note that some fuels will have better anti-knock properties under load (MON) than others, despite the fact that they carry the same PON or RON. Also, other factors besides fuel octane rating will affect detonation, such as tuning, engine wear, humidity, altitude, ambient temperature, etc. The bottom line here is to find a fuel brand and grade which works well for your car under the conditions in which you drive it. BTW, for those of you complaining about the fuel differences in the USA, here is a map of the problem:
http://www.exxon.com/exxon_gas/us_fuels_map.pdf

Here is some high-octane consumer info from the US Federal Trade Commission. Warning - do not read if you have been paying extra for super unleaded all these years, LOL.
http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm

 

We can get 100 unleaded here in Ohio