NA-088

has anyone tried any of the caltex vortex 98?

RedRover

NA_088 I used Caltex Vortex 98 a couple of times recently on a long trip from Melbourne to Brisbane & return. Didn't notice any difference. Perhaps browse some of the older threads??

https://www.s2ki.com/forums/index.php?showtopic=53512


https://www.s2ki.com/forums/index.php?showtopic=82858


https://www.s2ki.com/forums/index.php?showtopic=101354

Frisky

I have used to run my S2000 on Optimax in the UK and was very happy with it, tried it in the X-Trail here and it was not so good.

Switched to BP Ultimate and the difference was really noticeable, it was much smoother and felt like it was more responsive.

Recently switched to Caltex Vortex 98 and not that impressed, the car feels sluggish again.

I am stuck with Caltex due to having a company petrol card.

- Adam

NA-088

i have just begun trialling caltex....will know after after a few fill ups.

honda9krpm

I used to fill her up with BP Ultimate but lately I've been using Boost 98. Boost 98 has 10% ethanol and octane rating of 98.

dbzerk

Any difference?

Vuey

I use BP ultimate / Optimax / Vortex 98 / Mobil S800

and to be honest , i dont think there is the slightess difference between them . Beleive it or not , i recently filled up a few times on BP PULP 96 and i actually got a few more km's out of a full tank . With same driving condtions as with any of the 98 fuels .

If any of you guys can point out an obvious difference between these fuels then i would be extremely impressed

RedRover

Honda have said it's safe to use up to 5% ethanol in 2004 & later NA models.

It might be a good idea to check out what the risk factors are in using 10% ethanol in a pre-2004 car with a turbo.

honda9krpm

dberg & RedRover, I saw that warning too but don't think it's significant. I've researched for reason of the warning and only found one reason. Old fuel tanks are dirtier than new one and the ethanol based fuel may loosen the dirt and cause filter blockage.

I and a friend have been using this fuel on a 1993 and a 1991 GTR without any problem so far too. I've not try it on a stock S2k though. As I mentioned before in the other fuel thread under the oz forum, the ethanol is a great knock retardant and is great for turbo car.

Frisky

I thought the main problem with ethanol in fuel is the acid that is produced as a by product of the combustion process, citric acid IIRC.

I used to race petrol engined radio controlled cars which use a fuel that is a mix of castor oil, ethanol and nitro - after every race meeting it was necessary to run some lay-up oil through the engine to neutralise the acid and prevent corrosion.

The reason newer engines can cope with some ethanol is that the engine internal materials have been tested and proved to resist the levels of acids produced.

You might not see short term problems running fuels with ethanol in them but long term could be a different story.

- Adam