Gas...

[SmartDrug]

This is the fastest moving thread I've ever seen, look at those time stamps.... jeez

[scratch]

I run junk, but I run expensive junk; Chevron 87. It has great detergents that really helps keep the carbon from building up in the combustion chamber. And, I notice that the bike runs better on it; but not Chevron 89, it hates that, bucks terribly. Stock bike, stock ignition, Srinath jetting.
The stock ignition is probably the main reason why it runs better on the lower octane. Running higher octane gas is like retarding the timing; you might get better fuel economy, but not on these bikes.

[davipu]

regular at 2.05?  I hate you. it was at 2.53 last night when i rode past the station.

[Stephen072774]

So what would fuel labeled as "for flexible fuel vehicles" used for?

I have no idea, but when I read "Flexible fuel vehicles," I had a mental image of picking up a GS, folding it, and putting it in your pocket.   :lol:

Thats E85... its 85% ethanol and 15 % gasoline.  Its used in those new hybrid vehicles everybody has out now.

http://www.e85fuel.com/e85101/flexfuelvehicles.php

[indestructibleman]

My 1990 GS has a sticker under the seat(the one that tells recommended tire pressure) and it says not to run anything under 91 or 93(can't remember and too lazy to check).  Why would Suzuki print that?  to help the Oil tycoons?  That strikes me as ridiculous.
-Brian

is that 91 RON or 91 CLC?

the octane rating on pumps in the US is CLC.  sometimes in manuals on import vehicles, the octane is given as RON.

a vehicle that needs 91 RON will run fine on 87 CLC.

http://type2.com/bartnik/octane.htm

[Roadstergal]

I've never heard CLC before; most automakers and gas stations refer to (RON+MON)/2 as Anti-Knock Index, AKI.

[Recreational_Anxiety]

regular at 2.05?  I hate you. it was at 2.53 last night when i rode past the station.

No no no... you're all lucky... it was $0.94/L here yesterday.  Converted to Gallons and American dollars it works out to $2.88  - now who's getting burned?

[Crim]

From the specs I've read, the GS's motor has 9.0:1 CR pistons.  Thats fairly low for an all motor engine IMO.  Unless you're running your ignition timing super advanced, I wouldn't see any reason why you should run higher octane gas.  I just can't see the motor detonatiing with lower octane gas with that CR.