What gas is everyone using?

[happykat]

I run 87 in my '08 GSX650F, and have had no pinging, even though it's 12.5:1 compression ratio engine.

Happy riding,
Kirk

[Chuckqc]

few things on ethanol..

hi there ! i'm new (and by the way i'm working in chemistry)

there's a few things a can say about ethanol,

the good:
-ethanol is more environmentally friendly
-ethanol is CH3-CH2-OH, you can see there's oxygen in molecule, it can bring "liquid" oxygen to the combustion chamber and that can "raise" the octane level by few point (or decimal" like a little turbo
-ethanol can merge with water and keep the tank free of water residu

the bad:
-ethanol evaporate really fast, if you leave your bike without running it for 2 or 3 weeks, the water "merged" with ethanol is released in carburetor, and the varnish build-up is faster.
-i'm not sure.. but ethanol can sometimes dry-up more faster rubber and plastic parts that are in contact with the gas
-more power = more heating.. idle speed can run a little faster than supposed
-can dissolve fiberglass tank, i'm thinking more of boating activity, but for the bodyshopper that can read this message..

so good or bad ? dunno.. make your choice. and don't store your bike with a tank full of ethanol !

[astevens54]

Anything more than 87 on a stock engine is a waste of money.

[DClark]

I usually use 91 because :
1) It will be ping when it is over 90 degrees outside and I am running it hard. I blame this on the stock CA spec ignition box and 5 degree ignition advancer.
2) Gas will lose octane as it sits. In the winter time, the bike might get ridden once a week or once every two months, depending on the weather. So, it gets 91 octane along with Startron.

However, I recently started running 87 octane. From what I have read, some of the things that are used to make 91 gas can have less energy than the 87 stuff, which means a little less power and mpg.
I know that racers use the lowest octane required and that is what I try to do.

[cintidude04]

Why was this thread brought back to life.... really....

[REDKAT98]

I have a 1998 GSX600f and put 91 and it runs great. I did put 89 but it seems to run differently in a negative way so I went back to 91.

[Nut-Nut]

I used to use the $1.00 a gallon a really long time ago, then subsequently moved up to $2, 3$, and now a little over $4.00 a gallon, oh yeah, but the Octane has always been 87...:redte ars

[numus]

I run 89... it is 50ish cents more a fillup than 87 so figured.... what the hell

[scottynoface]

100 octane, because more octane equals more powah.

[Kreylyn]

If your bike doesn't run the best on 87 octane... you really should fix your bike.

Jus sayn...


Krey