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Old 08-29-2010, 02:32 PM   #31
cug
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Addition: just got home after another 70 miles or so and it's true - no hot feet or hand feeling. I had that after a 20 minute ride before I switched back. It might be something else, it might be imagination (I doubt that as it was "switch" behavior when it got bad again, not over time), but that's what it is for me: shitty fuel.

I'll probably run premium (AKI 91) for two or three fills and then do another run with the lower grade to see whether I can reproduce it. If yes, I'll bring that information to the dealer and see what they have to say.
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Old 08-29-2010, 04:37 PM   #32
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Quote:
Originally Posted by cug
Addition: just got home after another 70 miles or so and it's true - no hot feet or hand feeling. I had that after a 20 minute ride before I switched back. It might be something else, it might be imagination (I doubt that as it was "switch" behavior when it got bad again, not over time), but that's what it is for me: shitty fuel.

I'll probably run premium (AKI 91) for two or three fills and then do another run with the lower grade to see whether I can reproduce it. If yes, I'll bring that information to the dealer and see what they have to say.

Interesting.
Ive only ever used premium 98 but Im tempted to try 91 or 95 to see if it makes any difference.
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Old 08-29-2010, 04:53 PM   #33
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Originally Posted by 1coolbanana
Interesting.
Ive only ever used premium 98 but Im tempted to try 91 or 95 to see if it makes any difference.
Be careful about the different systems used throughout the world. 91 AKI (Anti Knock Index, or whatever alphabet soup they have here) is the highest available here at the Chevron gas station.

It might just be worth a try as it might be just the different things the bike does to accommodate for fuel difference make it better or worse. Going down in Octane rating made it worse for me.

Also: it takes a while to smooth out after a change normally. I'd ride close to empty and switch then. Or, if going up, you can always add an Octane booster.
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Old 08-29-2010, 05:06 PM   #34
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Quote:
Originally Posted by cug
Be careful about the different systems used throughout the world. 91 AKI (Anti Knock Index, or whatever alphabet soup they have here) is the highest available here at the Chevron gas station.

It might just be worth a try as it might be just the different things the bike does to accommodate for fuel difference make it better or worse. Going down in Octane rating made it worse for me.

Also: it takes a while to smooth out after a change normally. I'd ride close to empty and switch then. Or, if going up, you can always add an Octane booster.
Standard here is 91, premium is 95 and super premium (they call it ultimate or something like that depending on brand) is 98.

Not sure how that translates to what you guys get but from what Im led to believe, our 95 premium is equivalent to your 91?
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Old 08-29-2010, 05:12 PM   #35
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Quote:
Originally Posted by 1coolbanana
Standard here is 91, premium is 95 and super premium (they call it ultimate or something like that depending on brand) is 98.

Not sure how that translates to what you guys get but from what Im led to believe, our 95 premium is equivalent to your 91?
http://en.wikipedia.org/wiki/Octane_rating

Can't answer that question, but we get really shitty gasoline in the US because the farming lobby wants to sell their corn based ethanol at higher prices than they could sell their corn.

That stuff is pure shit and we get 10% mixed into our gas. For all the lobbies it works out great: they add 10% crap, your engine consumes 10% more on average, therefore you buy 10% more at the gas station - corn farmers win, oil industries win, customer and environment looses. Thanks to asshole lobbyists and corrupt politicians.
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Old 08-29-2010, 05:18 PM   #36
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A magazine review I read the other day noted the 2010 GS/GSADV bikes were rev happier but also vibed more. Perhaps as with the pushrod GS's, they will smooth out more as the miles/km's are piled on.

Thinking (typing) out loud, I'm not sure I've heard 2010 RT owners having this same vibe observation.

Edit: One more add... for those suspecting, or wanting to guard against crappy fuel or ethanol blended fuels, the Chevron Techron (U.S.) fuel injector/system cleaner supposedly is a very good product. Almost like a tune-up in a bottle.

sfarson screwed with this post 08-29-2010 at 05:25 PM
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Old 08-29-2010, 05:23 PM   #37
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Originally Posted by cug
Thanks to asshole lobbyists and corrupt politicians.
Dont think you got the monopoly there .
Same problem here.

So from that link our classification being RON, your 91 is our 95.

I may try 95 and see if there is any difference.
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Old 08-29-2010, 05:25 PM   #38
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Quote:
Originally Posted by 1coolbanana
So from that link our classification being RON, your 91 is our 95.

I may try 95 and see if there is any difference.
I think it's worth a try. Might just be what your engine likes best - higher or lower octane fuel compared to what you use right now. And, it might not make a difference at all and I'm imagining all this.

Though I doubt it's my imagination as described. If it was gradual change - yes, maybe. But not something that switched from one second to the next for the worse.
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Old 08-29-2010, 05:51 PM   #39
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Quote:
Originally Posted by cug
[URL="http://en.wikipedia.org/wiki/Octane_rating"]
Can't answer that question, but we get really shitty gasoline in the US because the farming lobby wants to sell their corn based ethanol at higher prices than they could sell their corn.

That stuff is pure shit and we get 10% mixed into our gas. For all the lobbies it works out great: they add 10% crap, your engine consumes 10% more on average,.
Not quite true. Adding 10% alcohol which has 10-15% less btu than gasoline, should not reduce our mpg by 10%. Unless alcohol contributes 0 btu. In reality it should only reduce mpg by a few percent. Having said this I detest what the mandated 10% alcohol is doing to our fuel systems. And it'll only get worse as the Government keeps subsidizing alcohol to keep it priced less than gasoline. The higher the percentage of alcohol the cheaper the gas can be marketed. We'll be lucky if we can find "only" 10% alcohol in a couple years, unless something changes.
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Old 08-29-2010, 05:59 PM   #40
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Not quite true. Adding 10% alcohol which has 10-15% less btu than gasoline, should not reduce our mpg by 10%. Unless alcohol contributes 0 btu. In reality it should only reduce mpg by a few percent. Having said this I detest what the mandated 10% alcohol is doing to our fuel systems. And it'll only get worse as the Government keeps subsidizing alcohol to keep it priced less than gasoline. The higher the percentage of alcohol the cheaper the gas can be marketed. We'll be lucky if we can find "only" 10% alcohol in a couple years, unless something changes.
I know it's not the full 10% you loose and I have no way of comparing non-ethanol to ethanol fuels.

It's the combination with all the problems caused by it. It attracts water, it doesn't stay properly mixed with the gasoline, it burns slower, it destroys some rubber and plastic materials. All in all we are loosing much more than we can ever win from this crap in the fuel. You can't for example let a tank full of this mix sit for some month without risking your fuel injection system. If you live in an area with high humidity, the risk of damage to the fuel system is pretty high ...
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Old 08-29-2010, 06:15 PM   #41
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cug I agree and feel alcohol is problem, in many different ways. I just didn't want to perpetuate the myth that a blend of 90% gas / 10% alcohol will only produce 90% of the BTU's of gasoline. After all alcohol *does* burn.
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Old 08-29-2010, 06:23 PM   #42
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Originally Posted by ridewv
cug I agree and feel alcohol is problem, in many different ways. I just didn't want to perpetuate the myth that a blend of 90% gas / 10% alcohol will only produce 90% of the BTU's of gasoline. After all alcohol *does* burn.
This is quite true, unfortunately it burns completely different from gasoline which makes it harder on the engine. It doesn't seem to work to just add up BTU and everything is good. But it does seem to change the "burn behavior". I'm not a chemist or specialist at all, but I know that I get always about 10% better gas mileage when I am in Germany compared to when I'm in the US - with the same engines (I alway rent Volkswagen or Audi). And I'm driving faster in Germany than here. Way faster as I'm always in a hurry and it's legal.

Wether it makes sense or not, I still think the loss in power from adding ethanol is the smallest of the problems that stuff creates for engines.
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Old 08-29-2010, 08:06 PM   #43
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I put the full Akrapovic exhaust system on last week. It deletes cat and exhaust valve. Between 4k and 5k it is night and day smoother. Very noticeable performance difference. System isn't much louder then stock. The con is the price...
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Old 08-29-2010, 08:08 PM   #44
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I put the full Akrapovic exhaust system on last week. It deletes cat and exhaust valve. Between 4k and 5k it is night and day smoother. Very noticeable performance difference. System isn't much louder then stock. The con is the price...
How much is it?
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Old 08-29-2010, 08:13 PM   #45
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How much is it?
12-1300ish.
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