20 replies to this topic

[Gerbil367]

When the tanker strike was on a couple of years ago, I remember seeing tankers lined up from supermarket and brand names waiting at the refinery - maybe they do add something along the way, but I would like to know as well as I put 99 octane in every 3-4 tankfulls for the mini and my old daily as I was told it helped to keep the system and engine cleaner running?

[racingbob]

When the tanker strike was on a couple of years ago, I remember seeing tankers lined up from supermarket and brand names waiting at the refinery - maybe they do add something along the way, but I would like to know as well as I put 99 octane in every 3-4 tankfulls for the mini and my old daily as I was told it helped to keep the system and engine cleaner running?

yes I believe that is so prop more so injection

 

I use it all the time never have I put 95 in my mini

 

it pays for itself as you get about 5% better consumption

 

that was with optimax in AUS was tested

[69k1100]

I used to work at a servo. We had an old tale of a company that did the maths and upgraded their fuel cards to accept 98 as they saved money in the long run.

As for ethanol, it will boost octane but is more hygroscopic than regular petrol and doesn't like natural rubber. You will also need 40% more ethanol to get the same btu as petrol like for like, however compression and timing can help alleviate this.

Go nitrile or viton seals. Boost it. Smiles per miles.

[Spider]

Our Ethanoll here (and I think it's the same in most parts of the world) comes from Sugar Cane Crops (or crops of some sort), it contains a very high percentage of water when they blend it with petrol.

 

I'd live to say it's good, but it's rubbish, it's also far from 'green', I think it's forced on the fuel companies so the Polies can say 'Look what I've done".

 

We seem a little more fortunate here - for the time being at least. Only our 91 fuels have it, but our 95's and above don't at this time.

Edited by Moke Spider, 25 February 2015 - 12:03 PM.

[Deev]

I've only just recently found out about ethanol-gate... I too was under the impression that regular petrol has more ethanol in that super - and that in fact there's a movement for the mix to be upped to 10-15% soon. Does anyone actually use the additives available that claim to offset the negative impact of ethanol in older cars...?

[69k1100]

Water in fuel isn't necessarily a problem, it's the phase separation that kills the tank and fuel system, you can add stabilisers to your tank to stop it separating.

Fuelling in general requires more proactive management these days, lead additives, stabilisers and altering tune depending on the fuel quality. As well as managing water in fuel through mechanical seals. Perfect fuels don't exist anymore (if ever).

Personally I'm with the ethanol group as the octane rating has me dreaming of turbos. And it usually comes from corn, but they have developed bacteria that can produce it from just about any carbohydrate.