Optimax Extreme? Tried It?

[nsanity]

According to http://www.shell.com/home/Framework?siteId...ng_extreme.html

You can get Optimax Extreme at the following places.

Coles Express Dickson Cnr Antill & Badham St, Dickson, ACT

Coles Express Wanniassa 6 Sangster Place, Wanniassa, ACT

Anyone tried it? hows the pricing compared to BP98?

[Terminal]

I've used it a fair bit, i usually get about 20 - 40km extra out of a tank, depending how i drive. i don't know if that's worth the extra 5c it is over BP98. also being 5% ethanol doesn't really appeal to me, but i figured 5% couldn't hurt too much.

[nsanity]

I've used it a fair bit, i usually get about 20 - 40km extra out of a tank, depending how i drive. i don't know if that's worth the extra 5c it is over BP98. also being 5% ethanol doesn't really appeal to me, but i figured 5% couldn't hurt too much.

From an Engineering point of view, i've heard mixed reports on it - some say its good (anti-detonation) others bad (corrosion over time).

Any comments? or do i need to hassle a chemical engineer?

[low200]

for a car not tuned to run hi octane fuel its a waste of money not to mention nissan dont support running ethanol in pre 2004 vehicles. esp when its 15-17c a litre more then ULP.

[leech_]

i ran it for a while in mine but have since gone back to BP Ultimate... for the following reasons

Cost - not such a big issue but it was slightly more expensive than ultimate

But the main reason why i stopped using it...

Availability - i was sick of having to drive to wanniassa or dickson as neither are that close... Plus think about when out out of canberra not many places have it... BP Ultimate is everywhere now so i can be assured that my car is going to have the same healthy juice

[Terminal]

Well, it helped my car because the stageas, and i'm pretty sure all RB25DET's standard run rich, mine is currently at 11:1 A/F. having ethanol increases the amount of oxygen molecules in the fuel, essentially increasing that A/F ratio. i'm not sure if it brings it to the optimal 12:1, but it gets closer.

due to the ethanol having more oxygen, it is therefore more reactive, and it deteriorates the seals and rubber o-rings in the fuel system faster. that's the downer of using ethanol fuel i guess. newer cars don't have the problem, but most skylines being early to mid 90's cars do.

this is pretty much all i know about it, i'm sure other people know more, or know it more correctly than i do.

[Sauce]

I ran a coule of tanks but went back to upltimate because I couldn't be bothered driving to Dickson for it. I didn't really seem to get that much extra out of it for it to be worth my while.

[leech_]

you are right terminal it does run a little leaner which helped me as well thats why i was getting a few extra km's but in the long run it's a band aid fix for your car running rich as

[JaiJai]

Im still a little scared about ethanol... i dunno i think ill stick with BP98 till i hear some long term reports

[StinkyPoo]

Ethanol is a good additive, it's cheaper, has more enrgy and runs cooler. What I don't understand is why we pay 5cents more for it. Only problem i've heard is that it eats through the old style rubber fuel hose.

Edited September 6, 2006 by StinkyPoo