Octane

1
Always lots of controversy about Octane. My understanding is that lower
Octane ratings will be ignited under compression before the higher
ratings - meaning that, not relying on Spark as much, a high
compression engine will pre-ignite, and thus 'Knock'on lower Octane
fuel. This means that as a higher compression engine ages and loses
compression, the more suitable lower Octane fuel will be for it.
As for using higher Octane fuel to increase performance - well,
possibly at the higher rev end - as in Motor Racing.
Try a Google Search. There's heaps of Info on Octane Ratings.
Michael.
2
I'd never heard that the WBX engines head problems could come about
due to the octane rating of the fuel, I had only read about the water
leaker stuff and hence have some Nulon Red coolant to put in asap.

There is a sticker next to my fuel filler that says to use 91 RON minimum.

Anyway, I'm all for the environment, so lately my favourite petrol
station is a "liberty" I think that sells E10, Ethanol enhanced petrol
that has an octane rating of 94. I feel that E10 is more of a placebo
for society but would still rather fill up on this, and am happy to
have the slightly improved octane. They also have a premium ethanol
blend that has an octane of 98.


Project going well. Thanks as usual and talk soon. Sam.


--- In Syncro_T3_Australia@yahoogroups.com, "michaelblayney"
<embkb@i...> wrote:
>
> Always lots of controversy about Octane. My understanding is that lower
> Octane ratings will be ignited under compression before the higher
> ratings - meaning that, not relying on Spark as much, a high
> compression engine will pre-ignite, and thus 'Knock'on lower Octane
> fuel. This means that as a higher compression engine ages and loses
> compression, the more suitable lower Octane fuel will be for it.
> As for using higher Octane fuel to increase performance - well,
> possibly at the higher rev end - as in Motor Racing.
> Try a Google Search. There's heaps of Info on Octane Ratings.
> Michael.
>
3
stuff and hence have some Nulon Red coolant to put in asap.

Contacted Nulon many years ago and they said not to use their coolant
in WBX motors.



> Anyway, I'm all for the environment, so lately my favourite petrol
> station is a "liberty" I think that sells E10, Ethanol enhanced petrol
> that has an octane rating of 94. I feel that E10 is more of a placebo

E10 not recommended by Volkswagen. (Carry a fire extinguisher also)

>
4
Hey I dropped Nulon a mail and received this response:

Dear Sam,

I am not aware of the exact formulation details of the recommended
coolant for this problematical issue. I have spoke at length with
numerous VW specialists and the consensus has been that our Red
Concentrated Coolant is suitable. I have not had any negative
feedback from those that have used it. I am affraid though that it
is your decision.

Kind regards
Chris Pascoe

Nulon Products Australia Pty Ltd
1/4 Narabang Way
Belrose NSW 2085

And although I haven't fully researched the matter my understanding
was there has been several myths about the safety of E10. My
feeling is that if your going to have a petrol fire, it would happen
whether you were running E10 or standard petrol, and either way you
are pretty far up the creek in need of a paddle!

:) Sam.


--- In Syncro_T3_Australia@yahoogroups.com, "hdvwoc" <plander@o...>
wrote:
>
> stuff and hence have some Nulon Red coolant to put in asap.
>
> Contacted Nulon many years ago and they said not to use their
coolant
> in WBX motors.
>
>
>
> > Anyway, I'm all for the environment, so lately my favourite
petrol
> > station is a "liberty" I think that sells E10, Ethanol enhanced
petrol
> > that has an octane rating of 94. I feel that E10 is more of a
placebo
>
> E10 not recommended by Volkswagen. (Carry a fire extinguisher also)
>
> >
>
5


> Dear Sam,
>
> I am not aware of the exact formulation details of the recommended
> coolant for this problematical issue. I have spoke at length with
> numerous VW specialists ..........................

Well there's a clue. How many T25 specialists are there now?

>
> And although I haven't fully researched the matter my understanding
> was there has been several myths about the safety of E10. My
> feeling is that if your going to have a petrol fire, it would happen
> whether you were running E10 or standard petrol, and either way you
> are pretty far up the creek in need of a paddle!
>
> Sam.
>

To clarify this one, ethanol disolves old fuel lines and have been known to cause fires. If ethanol of more than 10% is bad for your engine, then wouldn't 10% be a little bit bad? Volkswagen do not recomend it.

Here is some unleaded information from a VW specialist;

http://www.cvwc.com.au/ARTICLE_ULF.html