weirdsteve

this may have been up b/f, but anyone ever have problems running 87 in their bikes? i always put 93 in my 929 but im plannin to go cheap this summer. Lemme know if this could *** up my engine.

KRONO31

Do the math.

Say u go 10,000 miles this summer and get 40 miles per gallon...
You will need 250 gallons of gas. Now multiply 250 gallons by an extra .20cents if that... comes to 50$ difference max. for the ENTIRE SUMMER why take the risk. Gotta have some sort of effect on it if it requires the higher octane but i couldnt tell you for sure.

extra buck a fill-up? c'mon

Spencer75south

when it only cost's you $4 to fill up your tank with premium instead of $3.50 with regular why would you put regular?!

crazytexan

The 93 is harder to ignite so it is used in high compression engines to prevent knocking. If 87 was used in a high compression engine it would ignite from compression and from the spark of the spark plug, which would cause it to knock. Hayabusas can run 87 with no problem. So Im sure you could run it too but with the little price difference I dont think it would matter either way.

weirdsteve

in philly its bout 25 cents more, does it make a difference what gas u run? if 87 is ok then why pay more.

Kaotic

steve ya cheap bastard just run the 93 lol

tha1nonly4evaz

i thought that the engines (like cars) are programed for a certain type of octane/gas.
the more octane the more power? right?
you just don't wanna over do it or it will mess up your engine.

Schwartz

I'm not blasting on you but this is not always true. As the Crazytexan was saying the higher octane the harder it is to ignite. The explosion is also slower with the higher octane which with a properly tuned engine can get you more HP. With the engine were talking about you might even get a little better HP rating with a lower Octane fuel. The higher octane fuel is for the higher compression engines that don't turn the big RPM's. With the warmer weather you may notice some Spark Knock with the lower octane but you'll be alright.

headache

put 87 octane in and listen for pinging when you lug the motor. I can't run cheap stuff in my zx-9r, it detonates.

r6meanie

Wrong. (*edit: schwartz beat me to it.)

Higher octane does not mean more power.

Like someone else stated, the higher the octane, the slower the burn. You should run what your bike was designed for for the best performance. I dont know off hand what the stock compression ratio or octane recommendation is for your bike, but the owners manual should tell you.

If you have changed the fuel map or modified the ignition, then you may reap the rewards of higher octane, but until then it may actually hurt performance.

This is all assuming pump gas, oxygenated race fuels are a whole different case.

Should you decide to be a lazy *** and not find out your recommended fuel, go ahead and try a lesser octane. If it knocks, you need higher octane, if it doesnt, you should be good.

Schwartz

That's what I thought??? Great Minds think alike. PPfffttt..

crazytexan

indirectly, in the case of high octane, more power comes as a result of high compression. The high octane will not boost the power of an engine any if it is not required to make the engine run properly.

Schwartz

Great input on this topic. Well put guys!! :YEAH

crazytexan

my last post was late as yall have helped state the octane issue aslo. i got up to eat and entered it when i was done, my bad. oh well.