Re:what octane?? (1 viewing) (1) Guest
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TOPIC: Re:what octane??
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what octane?? 2 Weeks, 5 Days ago
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i have been using premimum gas in my 2003 silverado since i got it in june of this year..i just hit 9500 miles
but I think i saw a mention about using 87 octane
am i doing the bike harm...is performance suffering ?
seems to run excellent to me
rick
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Re:what octane?? 2 Weeks, 5 Days ago
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You're just spending money that you don't need to. These engines are low compression and really don't need to run the high octane fuel. Some people believe running premium can lead to SVS.
Paul |
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Hot and full of booze.....
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Re:what octane?? 2 Weeks, 4 Days ago
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Yamaha states do NOT use high octane gas! 87 only. Premium gas will burn hotter and in rare cases cause problems. Save the extra $$$ for chrome. 
Steven |
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Re:what octane?? 2 Weeks, 4 Days ago
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I have a lot of trouble believing higher octane will burn hotter. Octane affects pre-ignition, it is not "more powerful". Short of gun carrying rights, I think octane is the most debated subject on bike/car forums!  But I do agree its a waste of money, except I wonder about the cleaning capabilities of the additives they put in the high test (e.g. Shell) and maybe they are good for the FI bikes? |
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MS1700 (User)
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Re:what octane?? 2 Weeks, 4 Days ago
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I get good results from 89 but you know 89 is like 87 by time it gets to the end of the hose right? Ha ha! 87 Is best, you will get more MPG from it. Running the more money stuff once in a while won't hurt though. I do right before an oil change when I do my Sea foam cleaning treatment. Have to go with what factory says on this one though, good 87 is fine. Where do we find good 87 though? What will E85 do  Bad gas is so easy to get now a days, Keep that seafoam handy! |
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Experience is a tough way to learn ... because, you get the test first and the lesson afterwards.
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Re:what octane?? 2 Weeks, 4 Days ago
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MS1700 wrote:
I get good results from 89 but you know 89 is like 87 by time it gets to the end of the hose right? Ha ha! 87 Is best, you will get more MPG from it. Running the more money stuff once in a while won't hurt though. I do right before an oil change when I do my Sea foam cleaning treatment. Have to go with what factory says on this one though, good 87 is fine. Where do we find good 87 though? What will E85 do Bad gas is so easy to get now a days, Keep that seafoam handy!
All that alcohol in E85 will dry out every piece of rubber even faster (and probably make the bike run like crap). Your parts supplier will love you for it, though... 
I want good ol' leaded regular back.  I'm showing my age... 
RK
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Last Edit: 2009/11/02 19:05 By Roadkill1962.
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Re:what octane?? 2 Weeks, 4 Days ago
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I have run Chevron 87 since day one and zero problems. I also drop in some Lucas fuel treatment every couple tanks just in case. And I always run up and over the rev limiter at least once every time I ride. No SVS. Just did 1,000 miles last weekend 70 plus and got 45mpg the whole way.
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Last Edit: 2009/11/02 19:08 By takehikes.
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Every walk of life falls under the sway of the Testicular Imperative: either you have the world by them, or it has you.
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Re:what octane?? 2 Weeks, 4 Days ago
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The only time you need to run high octane is if you have high compression pistons and a built motor, I run 91 she won't run on anything else
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Re:what octane?? 2 Weeks, 4 Days ago
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kurtfriedrich wrote:
I have a lot of trouble believing higher octane will burn hotter. Octane affects pre-ignition, it is not "more powerful". Short of gun carrying rights, I think octane is the most debated subject on bike/car forums! But I do agree its a waste of money, except I wonder about the cleaning capabilities of the additives they put in the high test (e.g. Shell) and maybe they are good for the FI bikes?
Too low an octane with too high compression leads to explosive detonation rather than burning. Detonation will destroy an engine in short order! Higher octane fuel burns slower than lower octane to reduce explosiveness.
I am an FAA licensed airframe and powerplant mechanic with an inspection authorization and I spent 45 years working on airplanes before turning to motorcycles. The day of the 9-11 incident the FAA grounded airplanes nationwide for a couple of months; no airplane work caused me to get into motorcycles. A customer once asked me what I thought about a modification for a Cessna 172 and a friend who was a retired airline captain said "that will definately inprove the performance." The customer said to the captain "what do you know about that modification?" The captain replied "absolutely nothing" and continued "I don't care whether you are flying a Piper J-3 Cub or a Boeing 747. The lighter an airplane is the better it performs. When you get dome paying for that mod your wallet is going to be a whole lot lighter; therefor you have to have better performance!"
When you use high octane fuel (expensive) in a low octane engine and you "think" it runs "smoother", "better"; you have wishful thinking to justify the expense.
Clifford
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Re:what octane?? 2 Weeks, 4 Days ago
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