can i use octane 89 for my cb?

[eight]

f motors run 89

h22's need premium

it can actually have adverse affects if you run a higher octane in a motor that its not recommended for...

What?

Why would a fuel's resistance to detonation hurt your engine?

Answer: It wont.

[HappyGilmore]

F22a need 86, Not really unless your running like extreme, like 110 racing fuel

I ran 110 in my brothers old CB with the F22A6 and the temp guage went up just a lil bit!!!!! But ran like a bat out of hell!!!!

[Masamune]

I'm almost positive that higher octane gas does not equal better MPG's. You might be driving more carefully resulting in less wasted gas since you would pay an extra 20 to 30 cents per gallon, but resistance to detonation has nothing to do with how much fuel your engine uses.

Sounds like a self-fulfilling prophecy to me.

http://www.wanderings.net/notebook/M...sWorthTheMoney

http://wiki.answers.com/Q/Will_using...er-gallon_rate

http://www.fraudguides.com/tips/june2.asp

[Accordknown]

I alternate between 89 and 87 and 87 burns real quick, 89 last longer

[eight]

I alternate between 89 and 87 and 87 burns real quick, 89 last longer

As long as you are meeting the minimum octane rating of the engine (i.e. never causing autoignition) you shouldn't see any difference. If you do, something is off. Your engine might be running hot causing autoignition (even if it's not enough to cause knocking) or I guess you could argue that Honda rated the engine incorrectly.

The important thing to remember is that there is no more energy in one pump gas over another. 91 has the same amount of energy in it as 85.

Race gases may have a bit more or less energy since they use different mixtures to better resist detonation.

[casey92accordex]

i have run nothing but 87 in mine, every once in a blue moon i run some 91 in it. i get about 230-240 miles at the half tank mark though. but its bone stock. never had one problem out of it and it wont hurt it to run 89, 91, or 93 in it

['93CB7Ex]

i beat my car to hell everyday redlining all the gears and still get 350+ to a tank. im not sure on a automatic but it should be close or better than that.

[Masamune]

i beat my car to hell everyday redlining all the gears and still get 350+ to a tank. im not sure on a automatic but it should be close or better than that.

This.

Autos will typically get worse, but keeping up on regular maintenance will mean better gas mileage. Properly inflated tires, brakes that aren't silently frozen (happend to me), clean air filter and proper lubricants make for one happy car

[stretch JDM]

mmmm. 110 and a shot of nos.my cb7 loves that combo. and yea its a fact the more octane the better the performance and more gas mileage.once you get the feel for 91 or 93 oct.the more your car likes it too.and you tell me if you can feel a difference , get 93 and get some octane booster and tear ass. just dont pop rev limiter in neutral bro, this is not good.

[Potatoswatter]

Premium gas with N2O is important because then you're running high compression.

But it doesn't contain any more energy than regular, so it won't increase performance. THE ONLY THING IT DOES IS REDUCE KNOCKING. If you don't have engine knock (and you don't), there's no point in premium.

HOWEVER: some cars have adjustable timing with a knock sensor. The ECU will sense the premium and advance the spark, increasing your power. I had a car like that, it was a very nice feature, and combined with my driving habits it did actually improve my mileage.

But that wasn't because the fuel was more powerful.

[EJX_Michael]

mmmm. 110 and a shot of nos.my cb7 loves that combo. and yea its a fact the more octane the better the performance and more gas mileage.once you get the feel for 91 or 93 oct.the more your car likes it too.and you tell me if you can feel a difference , get 93 and get some octane booster and tear ass. just dont pop rev limiter in neutral bro, this is not good.

So much misinformation in this thread...

Higher octane DOES NOT equal higher performance in a motor that does not knock on low octane fuel.

Why? Because the amount of hydrocarbons (the chemical that provides the energy in combustion) does NOT change between octane ratings.

Any effect you feel is most likely a placebo effect. Remember when you first put an intake on your car? it FELT so much faster, when in all actuality it adds maybe 5 HP which is hardly even enough to fell.

So what is different about high octane gas? The resistance to combustion at higher temperatures. The more you compress air, the hotter it gets. Basically at an 8.8:1 compression ratio (stock f22ax) the air fuel mixture does not get hot enough to cause 87 octane fuel to explode without a spark. Say we put some higher compression ratio pistons in the f22ax that raise the compression ratio to 11:1. The air fuel mixture is being compressed more which means its going to get hotter! Too hot for 87 octane fuel which then explodes before the spark occurs (aka detonation) causing a major loss in power. The remedy is to put fuel in that has a greater resistance to exploding at a higher heat. Such as 93 octane.

Also SOME higher octanes have more or better additives or better brands with the higher octanes. For example go to BP and look at the labels for each octane level. Unleaded and Plus have nothing above them, but Premium has Amoco above it. My guess would be that it is of better quality and MIGHT burn better.

I've even read from several places that higher octane has LESS energy per gallon due to the increased oxidation of the fuel to achieve higher octane. I don't know if this is true or not though.



Watch this video
and type "octane rating" into google and read a few articles.
Learning is fun!

[eight]

EJX_Michael, thanks for bringing some sense to the thread.

This really isn't too difficult to understand. Detonation resistance folks, not more POWARS!!!

You could maybe argue that if the car's computer is constantly trying to push the limit it might reduce the fuel/air ratio (leaner) with higher octane fuels until knocking occurs and then bring it back a bit but I think that's a stretch.

[turbo90accord]

You could maybe argue that if the car's computer is constantly trying to push the limit it might reduce the fuel/air ratio (leaner) with higher octane fuels until knocking occurs and then bring it back a bit but I think that's a stretch.

and our cars computers are far from capable of sensing fuel type. Stick to low octane fuels if your car is stock and even with all the bolt ons. it is not until you raise the compression or turbocharge your car that you need any higher octane than whatever the lowest is avaliable in your area.