Fuel

[cobbadiggabuddyblooo]

Ran into Red Baron today by the servo while walming up the chain before oiling .. He was off for his first ride in almost a month.. Said he had been suspended but then he made me aware he was talking about yellow cards and his soccer matches

[Wombat]

Used to run the TRX on std 91RON and performance was ok.
Have tried 98RON and although it ran ok, the bike doesn't seem to have the performance to warrant it.
Happiest medium and what I use constantly is 95RON and MOBIL, at that. Bike seems to really like it.
If I can't get MOBIL then I run it on BP, and 3rd choice is CALTEX,..........never ever SHELL.
Bike has now just passed 90,000kms..............(without a rebuid!)

Bob

[Rod.s]

My totally ASD, OCD mate has done a test on his SUSzuki gsx 750 and he is 5% better off ($) in the final wash, by using 98 over all others. If that sort of thing get you going then save your 90 cents every time you refill, the benefits other wise are, cleaner carbs, less deposits buildup in the engine, and the perfume....You will off course loose any of the $ benefit when you give the old girl a fist full from the lights

Rod

[cobbadiggabuddyblooo]

Just think with the aussie $ at present after 100 tankfulls you'll saved enough to buy a set of FCR's to add to the performance

[cobbadiggabuddyblooo]

oops I mean 1000 tank fulls

[arrivisto]

Super unleaded smells nice

A teaspoonful of Castrol "R" castor oil in the fuel tank is even more evocative!

[Mincehead]

A little more than that is commonly used by four stroke racers, as is synthetic two stroke oil in their tanks of fuel, all helps in keeping a motor `lubed`.

[mickjmag]

I've always ran the rex on 100 octane avgas from my work, the modern avgas is half lead!! I've found no real noticeable power gain, but the mileage difference on highway use is noticeable, I get at least another 35kms out of a tank and I always fill the tank to top of the filler kneck.
Having said that, a guy at the airfield I work at has a P51-D mustang and he runs it on specialy bought 110 octane full lead avgas just like the good old WW2 stuff and by crikeys that makes the rex GO and the lawn mower darn near glows red

Cheers, Mick

[Mincehead]

You`re a lucky man Mick, folk over here would snap your hand off at the chance to run solely on Avgas.
And 110 proof, even better!

[k0no]

please correct me if i'm wrong here;

but i was under the impression that you should always try to use the lowest octane fuel you can, without the engine knocking. (i.e. start low and work your way up until the engine runs smoothly).

i suppose the reasoning for this would be that higher octane fuels take more compression/heat before they 'bang'. on high compression engines this is great... low ones i don't think so.

this nugget of logic only applies to "loosely tuned" road vehicles, and obviously not racing vehicles in high states of tune... but i'm fairly sure it's sound.

anyone got a retort here?

[edit; although i guess higher octane fuels burn cleaner, correct?]

[Mincehead]

Here K0no, check this out

http://en.wikipedia.org/wiki/Octane_rating

[k0no]

Here K0no, check this out

see, that just seems to agree with what i said.

forgive me for selective quoting here, but:

A common misconception is that power output or fuel efficiency can be improved by burning fuel of higher octane than that specified by the engine manufacturer. The power output of an engine depends in part on the energy density of the fuel being burnt. Fuels of different octane ratings may have similar densities, but because switching to a higher octane fuel does not add more hydrocarbon content or oxygen, the engine cannot develop more power.

the standard in the UK is 95RON, and although some places offer 98, i wouldn't ever buy it. it makes little to no difference (tried it in all my other vehicles including bikes, nothing noticeable).

[spanner]

shell fuel for me you can tell the difference, tescos is crap am sure its part eco fuel (plant) and i might be wrong but allso
contains a fair bit of water.