Octain question, Does it matter? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 05-16-2008, 11:07 PM Thread Starter
 
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Octain question, Does it matter?

I'm not trying to , but I noticed that the sticker inside the "trunk" lid recomends 91 octain min. and everything I've read here recomends reg. 87 octain.

Does it really matter, or is it just cheaper?
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post #2 of 8 (permalink) Old 05-16-2008, 11:26 PM
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There are 2 different ways to measure octane. The R+M/2 method is used in the US and that is the 87 octane rating you read about in the manual. The other method is where the 91 octane rating comes from on the sticker. In essence, they are both the same rating using different methods of measurement. Kind of like English and Metric. The bike runs fine on 87 and there is no value added in running 91.

Jim W
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post #3 of 8 (permalink) Old 05-17-2008, 12:20 AM Thread Starter
 
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That makes sence. Thanks.
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post #4 of 8 (permalink) Old 05-17-2008, 12:57 PM
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I have a favorite gas station I fuel up my VN at that sells gas with no 'eco' crap blended in. I use regular not to save money, but because reg. runs fine. I'm also concerned about the higher octane fuels not selling due to pricing so you may buy a tank of stale gas.

DT

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post #5 of 8 (permalink) Old 05-17-2008, 11:13 PM Thread Starter
 
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Quote:
Originally Posted by dirtrack650 View Post
I have a favorite gas station I fuel up my VN at that sells gas with no 'eco' crap blended in. I use regular not to save money, but because reg. runs fine. I'm also concerned about the higher octane fuels not selling due to pricing so you may buy a tank of stale gas.

DT
What is this "eco crap" you speak of?
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post #6 of 8 (permalink) Old 05-17-2008, 11:29 PM
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Most places have 10% methanol added.
Our Bikes run fine on it but get a little less MPG.

Chad Falstad "Hawk"
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post #7 of 8 (permalink) Old 05-18-2008, 12:54 PM
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Quote:
Originally Posted by Ccspinner View Post
Most places have 10% methanol added.
Our Bikes run fine on it but get a little less MPG.
The stations around here just started to carry that S**T and I cringed when I saw it...... but what ya gonna do?!

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post #8 of 8 (permalink) Old 05-18-2008, 06:01 PM
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The eco crap I speak of are the additives / fillers / or better said above S**T that reduces the life of seals, gaskets, and inhibits water absorption. My brother is a bus driver trainer and CDL tester in the state of Washington. He has forwarded several emails that have come his way about fuels (gas and diesel) that are being sold today as 'environmental friendly' that are causing long term problems with older engines / fuel systems.

95 VN750 (eBay)31k+
GL1100 front fender
OEM engine guard
OEM high back rest
'V-Twin' HWY pegs
Black 750 Spectre handlebars
SunPro Volt Meter (Amazon)
Maier bug shield (JCW)
Bar Ends anti-vibe (JCW)
Emgo air filters
Tank bag-Eclipse
Tail bag-FroZone Cooler
Back Rest-Igloo 6 pak cooler
WalMart Saddle Bags
R/R Relocate
Dry Splines Lubed
AGM DieHard-Sears
Gutted Goat
Sporster XL Mufflers
LED's-stop,tail,turn,marker
Pickup coil mod to .45mm
Silverstar headlight
Rotella T6
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