Fuel for your WR
Posted May 27, 2001 - 09:51 PM
Shell in Oz have a fuel called 'Optimax' which is a High Density High Octane unleaded fuel.
This fuel is basically a higher mass of fuel that is packed into the same volume. A tank of this actually weighs more than a tank of premium unleaded and therefore has more fuel available for combustion,supposedly resulting in better fuel economy.
Shell claims that it vapourises and ignites more readily and burns more completely. This improvement translates directly to a more efficient combustion, the most tangible result I've noticed being a more responsive engine.
I guess the high octane is perhaps the most obvious performance enhancement as it has a 98 RON .I think most other Premium unleaded fuels typically rate at 95 RON dependent upon the manufacturer and state controls.
I use it in my bike and don't have any problems.. in fact it runs great, never fouls plugs and seems to help in delivering a nice crisp throttle response.
I'm just curious to see what fuel other WR owners are running and what possible effects (if any) different fuels have caused in your
bike? How much does petrol differ internationally?
I've also ran super (which is leaded) and regular unleaded. I noticed nothing radcially different in the response of the bike, except that the Shell Optimax seemed rev a bit cleaner and there seemed to be less carbon build up around the end of the muffler?
The sticker on the tank said unleaded fuel only..I'd say this is to comply with ADR (road compliance) but are there any ramifications of running anything else?
Posted May 28, 2001 - 03:33 AM
Posted May 28, 2001 - 06:07 AM
Now, WHY is it not good to run race fuel or a 50/50 with premium unleaded pump fuel (U.S.)??
'99 WZ with ALL YZ mods, de-octopused, DSP Doug Henry airbox w/ velocity stack, FMF PowerBomb header, Stroker SX-1 silencer, SS front brake line, forked over by Pro-Action (and then fixed by me), OEM YZ tank, IMS YZ seat, carb mods by Jim Dean, Andy in OZ, & Sir "Taffy" from Jolly Old England, AMA, NESC.
Posted May 28, 2001 - 07:39 AM
If you want more info: http://arbis.arb.ca.gov/cbg/cbg.htm
Posted May 28, 2001 - 08:32 AM
Posted May 28, 2001 - 11:15 AM
I've got my suspension parts in the shop getting re-valved. Besides, I usualy take the big holidays off. Too many people riding around after consuming certain beverages and acting like idiots. No thanks. Oh well, back to the garage for me. Tinker time!
Posted May 28, 2001 - 08:03 PM
whats wrong with that?? just pop her up on the rear wheel and off you go! LMAO
Thanks for the blurb on Methyl Tertiary-Butyl Ether.. hehehe I must talk to my missus about that one!
Interesting to see that you pay around US$2.20 per gallon for your premium. We use litres here and that equates to around 4.54 litres for your 1 gallon. Given the exchange rates its works out to about $1.00 per litre which is pretty much what we pay here. (on average)
Posted May 29, 2001 - 01:56 AM
It runs well on it then suddenly the plugs stuffed, I have no problem with any other fuels.
The general sences seems to be you either love or hate it depending on your paticular bike.....
Posted May 29, 2001 - 03:59 AM
I ran Optimax in it from the day I purchased it.. I guess if your chopping and changes fuels a lot it might effect it, but doubt it. Id probably put it down to the bike maybe running too rich? With the wealth of knowledge on here Im sure someone could answer it. Im not really one of those guys that tinkers with everything.. I like to wheel her out, ride the ass off it and put it back away... (why did the thought of my missus appear in my head then? )
I ride the same areas as you do in VIC. **** I remember having to fill it up at Woods Point with Super and it ran smooth as silk. Just not 'as' responsive I guess.
Posted May 29, 2001 - 09:02 PM
For whats it's worth, a friend of mine has only used Turbo Blue, 110 octane, in his 2000 YZ 426 and has never had a problem.
2001 WR 426, YZ# Plate, YZ Fender, YZ pipe, YZ Tank, SDG YZ Seat, 13/50 Gearing, Pro-Taper Bars, TAG Triple Clamp, Throttle Stop Trimmed
Posted May 29, 2001 - 10:03 PM