What fuel do you use?

[cobo_11]

I personally run normal premium as I live in the country and the nearest servo with the better stuff is some 50km away! :-(

I put in some Coles Optimax when I was in Melbourne the other week (had a completely empty tank, so the tank is full of optimax, not half half)

I have not noticed and difference at all so far, I have travelled 200km and still have half a tank, just like before when I had regular premium in it, so no better economy for me.

As for when I "give it a bit", no difference once again, still pulls and goes the same. Has never pinged too, even on regular premium.

Oh, I have also been advised to NEVER use any additives to the petrol like octane booster, as it destroys the plugs MUCH quicker/heavily reduces the plugs life. Have been told this by a performance workshop. Not idle gossip.

Cheers all

[franks]

i notice plenty of difference when switching between BP, Opticrap and 8000, usually on my knock meter on my PowerFC hand controller.

im strictly a man....

[GTRgeoff]

Cobo

unless the ECU has advanced self improving features, not just basic self learning and protection, that attempt to extract maximum power at all times, you will find almost no difference with a higher RON/MON fuel. The possibility is an improvement in fuel economy.

I am currently discussing a race fuel sponsorship deal for a new product on the market that is a measured 101.9RON and 92MON (motor octane number) which meets CAMS limits for racing fuel in my class. This product achieved an 11% increase in peak power without retuning in a stroked VK V8 that gets run on track days. Obviously carby fed cars will benefit immediately, electronically managed cars you need to make some changes.

Specifically, I will be looking for an increase in boost and an advance in timing only to realise the extra power. If it requires a full remap I won't be running the fuel...simple. My reasons being the $95 per 20 litre price tag and the complexity of running a different fuel map in the PFC. I would be running the fuel during race only, then pumping it out into a container and refilling with Mobil 8000 and returning to almost stock boost and timing.

We will be conducting a dyno test of 8000, 8000 with toulene at different percentages and the race fuel to determine the differences, for the purpose of advertisement and to establish road and race trim.

There are plenty of threads on here if you ish to explore the idea further.

[Amaru]

Strictly BP Ultimate... Optimax is a tool of the devil

[ferni]

Optimax is rated between 95-98, BP ult and syn8000 is 98

[BOoStEr]

A friend that races in a pump fuel class told me everyone runs Ultimate because it's better

I run Optimax though because I can buy it 9c a litre cheaper where I live.

IMO If your car doesn't ping on Optimax going to Ultimate is pretty much a waste of money.

[gslrallysport]

Definately Ultimate guys... as someone previously said opticrap is only normal premium brought up to 98RON using an additive (dare i use that word! lol). As a result Ultimate is much cleaner for the environment because its refined to be at that level. My second reason for choosing Ultimate is that i have a hell of a lot of respect for BP and their effort to clean the environment. About 5 or 6 years ago it was pretty much decided that Australia by 2003 was going to have to meet Euro emmision regulations, ie only 50ppm of sulfur in diesel, as apposed to the curret 500ppm. BP immediately started upgrading all their refineries to cope with this and as a result when into huge amounts of det to do so... No other oil company in Australia followed suit, and as it turned out the Autralian government backflipped and still the max sulfur is still 500ppm. As a result of this expenditure for no return BP Australia 3 years nearly went belly side up. Yet still produce diesel at 50ppm where every other diesel is still 500ppm. I'm prepared to pay the extra couple of cents for the better 98 Octane coming from the better company, that's just my opinion.

For those living in BrisVegas however all Shell and BP fuel on the northside comes from the BP refinery anyway, and vice versa on the south side. So northside opticrap is actually Ultimate anyway... They did it this way so that each company only had to sent out pipelines that come from Pinkinba in one direction for each... Thus saving heaps of money.

Use both fuels and see, each to his own.

[cobo_11]

Cobo

unless the ECU has advanced self improving features, not just basic self learning and protection, that attempt to extract maximum power at all times, you will find almost no difference with a higher RON/MON fuel. The possibility is an improvement in fuel economy.

My ECU is a Mines...so I have no idea what a Mines is capable of...?

(I would imgine not that much seeing as its a re-chipped stock ECU...?)

[Guest RedLineGTR]

Usally stick with ultimate..since its also very close to me and the car seems to be happy with it