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+--- Forum: FZS600 Fazer (https://foc-u.co.uk/mybb/forumdisplay.php?fid=78)
+--- Thread: super unleaded 97RON (/showthread.php?tid=65605)
super unleaded 97RON - mobile mouse - 21-09-13
Just been reading the article (page 42) in Nov issue RIDE.
All about does filling with 97RON super unleaded make a big difference to fuel consumption.
If anyone has read the article how does the Fazer stand up, do you get the 15% gain like the RC8R.
Or no improvement.
I am not sure what the difference is going to be as the Fazer has carbs and not fuel injection.
They ran three tank fulls of super unleaded before measuring the fuel economy.
I wonder were the FZS600 would fit on the RIDE fuel economy challenge, because I am getting about 53mpg, or 250 miles out of 21litre tank my Fazer is a Foxeye with the larger tank.
Re: super unleaded 97RON - andybesy - 21-09-13
I haven't read the article, but my understanding is that a bike with a sophisticated engine management system (and probably also fuel injection which can be managed electronically) could adapt by running a leaner mixture, where as a carbed bike has it's mixtures set manually (mechanically) and so can't adapt unless adjusted manually to suit. Is that right? In any case your fuel efficiency is pretty good
Re: super unleaded 97RON - Dead Eye - 22-09-13
Agreed, the FZS 600 shouldn't have any real improvement because of the carburettors - you might be able to get a it of an improvement if you had it dyno'd to use the higher octane fuel. Having said that, I do use it in my bike. If nothing else, it does prevent premature detonation in the chamber.
In my car however, which is fuel injected, I've gotten about 15-20% improvement on MPG (from 24~ to 30~)
Also, some people recommend Kerosene (airline grade fuel) for cleaning out the fuel system a bit so I guess the higher octane might assist in that as well? Not significantly mind you...
Re: super unleaded 97RON - darrsi - 22-09-13
It's more about cleaning properties, which in turn creates better fuel consumption and a better working system than a clogged up one.
Re: super unleaded 97RON - Punkstig - 22-09-13
In which instance you might as well buy the normal fuel and then once a year use a bottle of stp (or similar) fuel additive over a couple of tanks to clean the system.
Obviously for the miles I do that would be cheaper for me than using super duper unleaded everyday!
I think Kevin ash did an article before his accident claiming that there was only a BMW bike with a sophisticated enough fuel injection system to see the mpg improvement that cars using it do!
Re: super unleaded 97RON - darrsi - 22-09-13
I dunno about improved MPG, but the bike certainly feels a bit livelier on the Shell V Power 99 fuel.
Re: super unleaded 97RON - AdieR - 22-09-13
Never tried 97RON, but I'd question whether the extra mpg outweighs the extra cost of it (ie, whether it's more economical from a financial point of view).
Re: super unleaded 97RON - darrsi - 22-09-13
I only use the 97 stuff, and the 99 every now and then.
I very rarely use the standard 95.
Re: super unleaded 97RON - Dead Eye - 23-09-13
I use Shell V-Power unless I have no other option for both my vehicles. I figure its almost the same concept as using expensive engine oil
The engine will run perfectly well with the cheaper option, but you may need to do a bit more maintenance a bit more often...
Plus, I don't do many miles (no commuting for me
) so its not a huge cost increase
Re: super unleaded 97RON - nick crisp - 23-09-13
Shell V Power, imo, definitely helps with the running of the thous when standard. I chopped and changed between that and the recommended 95 and am still 100% convinced it improves the running from the point of view of the low speed glitchiness of this model (gen 1). At one of the bike shops I used to work at, the head mechanic (a very knowledgeable and talented individual) used to say that generally Yams from this period (early 2000s) benefit from the use of V-Power. As far as I know, this was based purely on results, we used to recommend it to customers and got a lot of positive feedback to this effect.
I have since learned that due to considerations of ignition timing/compression ratio, most carburetted bikes should be better off sticking with 95 - that's the theory anyway. But now I've had the Ivanising done to mine, I'm gonna have another play between 95 and V Power, just to satisfy my curiosity.
Re: super unleaded 97RON - Slaninar - 23-09-13
"The higher the octane number, the more compression the fuel can withstand before detonating."
"Octane ratings are not indicators of the energy content of fuels. It is only a measure of the fuel's tendency to burn in a controlled manner, rather than exploding in an uncontrolled manner."
So it makes sense to put high octane fuel in any engine that has a very high compression. That will reduce the number (percentage) of premature detonations, before spark plugs do their job and pistons get into their final lowest position. That's how fuel consumption can be reduced (with a gain in power): by fuel not detonating too soon to slow the pistons down, but at the right time, to push them.
In a FZS600 engine it is a waste of money. I put the theory to the test for a few tanks and didn't measure any difference in consumption.
Re: super unleaded 97RON - darrsi - 23-09-13
I'll only really use the 99 during "summer" when the roads are a bit more drier, but without a doubt it does make the bike feel zippier in my opinion.
Re: super unleaded 97RON - Dead Eye - 23-09-13
(23-09-13, 12:44 PM)Slaninar link Wrote: "The higher the octane number, the more compression the fuel can withstand before detonating."
"Octane ratings are not indicators of the energy content of fuels. It is only a measure of the fuel's tendency to burn in a controlled manner, rather than exploding in an uncontrolled manner."
So it makes sense to put high octane fuel in any engine that has a very high compression. That will reduce the number (percentage) of premature detonations, before spark plugs do their job and pistons get into their final lowest position. That's how fuel consumption can be reduced (with a gain in power): by fuel not detonating too soon to slow the pistons down, but at the right time, to push them.
In a FZS600 engine it is a waste of money. I put the theory to the test for a few tanks and didn't measure any difference in consumption.
Precisely ^^
I use it mainly for the other benefits with any MPG increase as a bonus. Quite happy to use it without any MPG gain though