Petrol issue

[nudemetalz]

Well BP rang me up and took all my details.
I said that the bike is now running okay but they still said they are going to send me a $20 petrol voucher for my inconvenience.
How's that for customer service !!!

[janno]

Well BP rang me up and took all my details.
I said that the bike is now running okay but they still said they are going to send me a $20 petrol voucher for my inconvenience.
How's that for customer service !!!

Traitor!! Hush money . . .

[vifferman]

Just a note - like Gull's petrol, the BP 98 doesn't come from Marsden Point but comes in by tanker (unless of course, the petrol companies are lying...)

My VFR runs better on 98 than 91 or 95, except in winter, when it's a little harder to start on the 98.

My VFR750 wouldn't run on 95 at all - it fouled the plugs VERY badly, due to them having such tiny electrodes and the 95 just being 91 with more xylene and toluene (basically paint-brush cleaner!) added to boost the octane rating.

Interestingly (or not), there was a lot of fuss (and some prosecutions) in Western Australia when I was last there because some servo owners were buying cheap low octane petrol, adding xylene and toluene to it, and selling it as Premium. Funny how "The Gang of Four" can do that here quite legally and with the Gubmint's apparent blessing! It's a good wicket for them, because otherwise they'd have to spend millions on upgrading the refinery, and would have all these crap hydrocarbons there's not a huge market for...

[avgas]

I had it with 3 batches of Mobil 91. Ran rough as guts (like i was running diesel/fuel mix)
needless to say only if its the last thing on earth do i use that same fuel

[TLMAN]

Since i read this thread a week ago i have used two tanks of 91 instead of the usual 98. It seems to run and start heaps better on 91 so i think ill stick with it.

[swbarnett]

91 for all modern engines cars and bikes.
95 for old stuff like HQ holdens etc
98 for lamborgini and farrari etc.

Curious... I run the car (1994 Accord) and the GN on 98 and both get better mileage and have more power than when I ran them on 91.

[imdying]

Since i read this thread a week ago i have used two tanks of 91 instead of the usual 98. It seems to run and start heaps better on 91 so i think ill stick with it.

My SV is the 06, so slightly higher compression than the earlier ones, not sure how the compression ratio/squish etc compares with the TL, but it to runs great on 91

[Multiman]

Okay so maybe i have a problem and I don't know it??? I have run the Guzzi on 91 and 98 both BP... I can't tell the difference?? the bike runs fine on either fuel perhaps 98 is just a re badged 91 with delusions of granduer??

I think you may have had a bit of water in the fuel Nudes maybe going naked causes sweat to drip in the tank??

[babyblade250rr]

i was always told that later model bike well post 88-90 run on 91 as that's what they were designed or tuned to run on

please correct me if im wrong

[peasea]

Be corrected.

Our fuel is crap and I'll tell you why.

NZ fuel companies buy cheap crude and it'll only make cheap gas.

Buy imported, like Gull (either octane) or BP's Ultimate. We feed four machines on those brews and everything's fine. When we switch, for whatever reason (out of town etc), the idle quality suffers, mileage suffers and pinking occurs. What more can I tell you? We do heaps of k's on the bikes and in the cars and I've got 30-plus years behind me as an engine builder. I know what shit gas is and we've got shit gas.

[babyblade250rr]

Be corrected.

Our fuel is crap and I'll tell you why.

NZ fuel companies buy cheap crude and it'll only make cheap gas.

Buy imported, like Gull (either octane) or BP's Ultimate. We feed four machines on those brews and everything's fine. When we switch, for whatever reason (out of town etc), the idle quality suffers, mileage suffers and pinking occurs. What more can I tell you? We do heaps of k's on the bikes and in the cars and I've got 30-plus years behind me as an engine builder. I know what shit gas is and we've got shit gas.

Right i'll have to put this to the test next fill up, I'm going to gull!! so far i've been using caltex,Shell,Mobil(The worst so far i believe) all using 91 but gull is next on the agenda

[xwhatsit]

Curious... I run the car (1994 Accord) and the GN on 98 and both get better mileage and have more power than when I ran them on 91.

Probably just your mind playing tricks, at least with the GN (don't know anything about '94 Accords). The GN, being carburettored, has no facility for self-adjustment to avoid detonation. Hence, the added anti-detonation abilities of 98 (not that the GN would be knocking on 91 anyway) go wasted. On a high-compression fuel injected bike which might knock at full advance on 91, the ECU will retard the spark if it detects knocking, so you will lose some power. Run it on 95/98, the knocking will not occur, ECU will run at full advance, and you'll get more power.

I run my CB on 98 as it has either an over-advanced ignition, or other carburettion issues, so runs too hot and fries sparkplugs. At the moment, in winter, and with 98, it runs cool enough to largely avoid this as long as I don't sit in traffic too long. If it was in perfect nick, I'd run it on 91, and would probably run and start better, as it's a more `volatile' fuel.

[Conquiztador]

"Octane number measures whether a petrol is likely to cause knock in an engine. Knocking or pinking is caused by self-ignition in the engine's cylinders, which happens when the petrol/air vapour mixture in the cylinder ignites before the spark is passed by the spark plug. This premature ignition pushes against the crankshaft instead of with it, producing a knocking or pinging sound. Knocking causes the engine to overheat and lose power, and it can damage the engine in the long run.

The way to avoid knocking is to use petrol with a sufficiently high octane number. The higher the octane number, the more resistant the petrol is to the self-ignition that causes knocking."

[xwhatsit]

"Octane number measures whether a petrol is likely to cause knock in an engine. Knocking or pinking is caused by self-ignition in the engine's cylinders, which happens when the petrol/air vapour mixture in the cylinder ignites before the spark is passed by the spark plug. This premature ignition pushes against the crankshaft instead of with it, producing a knocking or pinging sound. Knocking causes the engine to overheat and lose power, and it can damage the engine in the long run.

The way to avoid knocking is to use petrol with a sufficiently high octane number. The higher the octane number, the more resistant the petrol is to the self-ignition that causes knocking."

Exactly. Octane number has nothing to do with the amount of `power' in the fuel or anything like that. Any extra power you get is from indirect sources, like fuel injection with tricky modern ECUs.

As an aside, I filled up with BP 98 today and it seems (as usual) a very nice bit of slosh; apart from the crazy drunk old man abusing patrons and standing in front of cars so they couldn't move lol. Was really hoping he didn't come anywhere near me but he just stared

Forecourt staff just looked on as if it was a normal occurrence.

[Roj]

I always use 95 (96 when that was about) I get 10% better economy in my cage than compared to 91, at the moment the price difference is around 3%, so it comes down to economics,

I don't normally bother with 98 as it doesn't normally gain anything on the economy,

My bikes are older so they are better on 95 than 91, but I aslo throw some upper cylinder lube in for luck