Wrong gas !!!! :( -_- | GTAMotorcycle.com

Wrong gas !!!! :( -_-

P

parrah

Active member
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Sooo today,
I was running low on gas,
pulled over at a gas station, and all they had left was 87....
I know my bike needs 91
but had no choice

how bad is this for the bike
 
not as bad as putting nos energy drink in your bike

what is your bike anyway?
 
Should have used Diesel instead.
Then you'd be begging for the 87.

Are you sure your bike needs 91? RON of 91 is 87 AKI.

Maybe you've been putting in the 'wrong' gas the whole time?
 
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1). How do you know that your bike needs 91 gas? Check in the bike manual, as most bikes will run just fine on 87.
2). If your bike actually needs 91 and still runs fine, just use up that 87. Or if you're desperate, then it's very easy to remove the gas from the tank. Get the manual, figure out how to unbolt the tank and remove the fuel feeding hose.

Btw, what bike is it?
 
If your gonna drain the tank...let me know... my bike runs just fine on that sludge
 
images
 
Your bike is fine.....

To all those who posted ********* comments....I will now start handing it infractions for those.

If you don't want to help a rider with their issues....click the next thread and let those who are willing to help handle these threads.
 
Paul said:
Your bike is fine.....

To all those who posted ********* comments....I will now start handing it infractions for those.

If you don't want to help a rider with their issues....click the next thread and let those who are willing to help handle these threads.
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Come on, sometimes it's good to bully the stupidity out of people.
Those were awesome responses.
 
parrah said:
Sooo today,
I was running low on gas,
pulled over at a gas station, and all they had left was 87....
I know my bike needs 91
but had no choice

how bad is this for the bike
Click to expand...

I have had to do the same thing while on a trip in the middle of nowhere, on a bike whose owner's manual and the sticker on the tank demand 90 octane minimum.

Keep the revs up and be gentle on the throttle. In other words, don't lug the engine down under load and avoid full throttle acceleration. That will avoid the circumstances that are likely to provoke detonation. Once you get to a place where you can obtain premium fuel and you have room for at least half or so of tank volume, fill it with premium and forget about it.
 
This is not a stupid question; I didn't know either until I found out the hard way that it was fine.

If your bike requires 91 but you put in some 87 then don't worry. The bike will compensate and ensure the engine doesn't destroy itself. You might lose a bit of power and efficiency but not a big deal for one tank. Plus you've probably got some 91 from your previous fillups that it would mix with.
 
jonpurdy said:
If your bike requires 91 but you put in some 87 then don't worry. The bike will compensate and ensure the engine doesn't destroy itself.
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This is not entirely true. While I don't know about the engine control hardware that BMW is using, I do know that none of the Japanese bike manufacturers incorporate a knock sensor in ANY of their high performance engines. Without a knock sensor ... the bike cannot "compensate" for the simple reason that the ECU has no knowledge of whether the engine is in detonation or not! If you put in excessively low octane fuel and operate the engine under prolonged heavy detonation conditions (lugging at high temperature) - ka-BOOM!

But ... Unquestionably, there is a factor of safety included in the manufacturer's recommendations. If they test the engine and establish that detonation conditions MIGHT happen on 88 octane fuel when the engine is running 2000 rpm 6th gear full load going uphill at 45 C ambient temperature in Death Valley with the coolant temperature at the upper limit (120 C) then they specify 90 octane fuel regardless of circumstances "just to be safe".

How often do you operate your sportbike engine at 2000 rpm 6th gear uphill with 45 C ambient and below-sea-level altitude (high ambient pressure ...) and the coolant temperature at the upper limit? Didn't think so.
 
Brian P said:
This is not entirely true. While I don't know about the engine control hardware that BMW is using, I do know that none of the Japanese bike manufacturers incorporate a knock sensor in ANY of their high performance engines. Without a knock sensor ... the bike cannot "compensate" for the simple reason that the ECU has no knowledge of whether the engine is in detonation or not! If you put in excessively low octane fuel and operate the engine under prolonged heavy detonation conditions (lugging at high temperature) - ka-BOOM!
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My mistake. I assumed all FI bikes had a knock sensor.
 
Let us know what bike you've got so we can give you the right answers.

99.37% of all CBR 250R owners think their bikes need 91 because it says 91 RON in the manual ;)

If you're on an R6 keep it under 9000RPM, that's where the spark advance really ramps up, 7000RPM for an R1.

-Jamie M.
 
My buddy put low octane gas in his '06 R6 once and it refused to go. Don't know if it was just ****** gas from that one station or not (actually I suspect he put in diesel but won't admit it) but we ended up buying a siphon for a few bucks to get most of it out and then topped up with higher grade. Bike ran fine after that.
 
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AF4iK said:
My buddy put low octane gas in his '06 R6 once and it refused to go. Don't know if it was just ****** gas from that one station or not (actually I suspect he put in diesel but won't admit it) but we ended up buying a siphon for a few bucks to get most of it out and then topped up with higher grade. Bike ran fine after that.
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Not sure about bikes, but some high-end cars will simply not run when low-octane or wrong fuel will get detected in the engine - i.e. diesel Mercedes or BMW.
 
If you put diesel fuel into a gasoline engine, it's not a matter of the fuel being "detected" ... it's simply that diesel fuel won't ignite under the conditions that exist in a gasoline engine (and gasoline won't ignite under conditions that exist in a diesel engine).

Wrong octane is a different matter. The properties of the fuel that will determine whether a spark will ignite it (cold starting) are not related to the octane rating.
 
parrah said:
Sooo today,
I was running low on gas,
pulled over at a gas station, and all they had left was 87....
I know my bike needs 91
but had no choice

how bad is this for the bike
Click to expand...

I've been forced to put 87 Octane in my bike before, luckily I was able to take the Octane boost canisters off the shelf to compensate.

I can't say what damage will be done, but essentially when you "knock" the piston detonation happens too early and will counteract the rotation of your crank shaft. This puts undo stress on the engine and you loose power. Quick and dirty layman's explanation :)
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