I just swapped a B16A2 and im wondering which level of octane i should use?
thanks

 

Premium

Edit: I think that's 91-93


[Modified by Happyman, 12:54 PM 3/19/2003]

 

Thats sounds right.

 

no question. thats all u should use

 

damnit...now its gonna cost me a arm and a leg for fill ups...
you sure i cant use 87 or 89? will i lose power if i do?

 

It'll run like ****. The level of your compression is what decides what octane. If you run lower octane then the fuel will ignite earlier which will set off your timing. Which could cause damage down the road. Just put out the extra 50 cents to a dollar and get premium. Or you could get Regular and spend money on octane booster.

 

If it makes any difference im running a P72 GSR ECU...i guess thats another readon why i should run 91

 

What is the exact Octane level to run for B16? What is recommended by Honda?

We have here

87
89
91
92

U ususally don't go any lower then 89. Is this to low?

 

my manual is for a 97 CX..and i cant find a online manual..thats why i asking

so far i looks like i need to run 91...

 

Civic Si is recommended to run Premium by factory standards.

 

run a minimum of 91

i run 93 or 94 in my B18 depending on how much sunoco feels like raping me

 

cali sucks the highest octane we can get is 91. damn environmentalist but i do know of a place near me were i could get 100 octane but that **** is $5 a gallon.

 

Does anyone know the exact number???

 

On the fuel door on my SI it says "Premium fuel only". Octane levels vary depending on where you live in the country. California/COMMUNIST state seems to only get shitty 91 octane as the highest. Here in NY/NJ/CT Premium fuel is 93 octane. However Sunoco Ultra 94 octane is available. I use Ultra 94. I'd use the HIGHEST OCTANE available to you. Don't go below 91. You have a high compression motor. Your car will run like ****. (timing retarded, etc.). You should've know this before you swapped in the motor. Don't cry, just buy good fuel..

 

Higher octane than is required will not make your car run better. Just get what is required and that's enough. Obviously if it says Premium then get Premium. I'm sure Honda took it into consideration that not every states Premium is the same.