Optimax Fuel Quality

[Sydneykid]

As far as I know, its a fact that BP Ultimate (who use the best Western Shelf Crude Oil) refine their fuel to 98 octane, where optimax is like putting a bottle of octane booster in your tank.

I have it on good authority.

I don't use the crap.

BASS OUT

So Bass, what do you get when you buy Ultimate in Sydney, where there is no BP refinery? What about Melbourne, where there is also no BP refinery? Ask your "good authority" where Western Shelf Crude is actually refined?

[Bass Junky]

Is there a refinery in Melbourne?

[Sydneykid]

Shell doesnt even sell Optimax in perth as a 98 octane fuel, We only get Ultimate and Vortex (which For our engines doesnt have high enough ron).

I would guess that is because it isn't worthwhile for Shell to ship Optimax accross the desert. They would have to charge more than BP, with their local refinery.

[Sydneykid]

Is there a refinery in Melbourne?

There is a Shell refinery at Geelong, I don't think there is a BP refinery in Melbourne. They have Kwinana in WA and Bulwer Island in Qld.

[predator]

Vortex (which For our engines doesnt have high enough ron).

bs my car runs quite happily on Vortex and notice barely any difference between it and the 98RON stuff. Maybe if I was taking it on the track or drag strip, but for the road its fine.

[CerealKiller]

I run Optimax without problem.

TonyGTst has told me he's had no issue with using Vortex.

[HoeTrain]

I run Optimax without problem.

TonyGTst has told me he's had no issue with using Vortex.

I have a fuel card for my job "free fuel, go me!!!" and the only premium I can buy is Vortex. I didn't have any problems with running it. Maybe people with more delicately tunned cars would notice a difference cause mine was pretty stock. I tried Optimax once and would never do it again.

[BOOSTD]

I went through a complete fuel test using BP98, Vortex, Opimax, Mobil synergy98 in one day while trying to keep constant temps.

knock levels were as follows Higher being worse and 75+ being an audible ping.

BP98 :27

Mobil synergy :37

Optimax :69

Vortex :80

BP98 +30% toluene :30 (plus 7 degrees advance) =)

Tests were done in SA. I have run both BP98 and Optimax in Sydney and found BP98 to be better, however as Sydneykid and others have stated the shell refinery uses old technology and batches differ. I would never use any other fuel in SA accept BP98 as I always got exactely the same knock level. Here in Sydney my levels are always different...again backing the fact BP uses optimax. I have given up and now have a cheap supplier for toluene. I am yet to find a fuel here I can tune to and trust.

[HoeTrain]

Damn. Good thing I don't put Vortex in a Skyline anymore. What’s the deal with Av-Gas. I have absolutely no idea what would happen if you put it in a car. Does anyone know??

[Sydneykid]

Damn. Good thing I don't put Vortex in a Skyline anymore. What’s the deal with Av-Gas. I have absolutely no idea what would happen if you put it in a car. Does anyone know??

AvGas has lots of lead in it, so filling up the cat and coating the lambda sensor.

[HoeTrain]

Hmmm, bad idea then.

[BOOSTD]

Is fine when running open loop and no cat.....but we all are in closed loop and have a cat of course.

[Busky2k]

Thanks for the test BOOSTD. Proves BP Ultimate is the shit!

[BOOSTD]

yes but not in Sydney. Mobil would be the most consistent IMHO...would you agree Sydneykid..?

[HoeTrain]

What is the general opinion in regards to "Octain Boost" addatives. Are they a good idea or a Crock of Shite??

[BOOSTD]

I used Wynns pro strengh for ages until my plugs were coated to the max with brown red sot. Have heard reports that they clog injectors..... Have used Nulon as of late and the plugs seem to be cleaner. Nothing close to toluene tho. I have been using tolunene at the same cost for a bottle of booster for a while now. (Hint: It's used in printers and costs a fraction of the price $2.20 at litre) =) nice

[QuickR33Melb]

Optimax causes my car to misfire as well.

BP is a much better fuel.

[HoeTrain]

I used Wynns pro strengh for ages until my plugs were coated to the max with brown red sot. Have heard reports that they clog injectors..... Have used Nulon as of late and the plugs seem to be cleaner. Nothing close to toluene tho. I have been using tolunene at the same cost for a bottle of booster for a while now. (Hint: It's used in printers and costs a fraction of the price $2.20 at litre) =) nice

Now that is interesting. I also noticed when I changed my plugs they had the brown red soot on them It must have been from the Wynns as you said cause I tried it for a while and didn't really notice any difference.

By the way what colour is Toluene? Blue Cyan or Magenta? Hehehe.

[BOOSTD]

Toluene is clear.

[turbomad]

OK so everyone swears by BP, however doesn't BP use Ethanol in there fuel?