Optimax Extreme 100

[ms700]

  Venom XR6 said:

Doesn't adding ethanol to petrol make it cheaper. If that's the case then why the hell is it more expensive than Optimax. Rip off bastards.

<{POST_SNAPBACK}>

They're out to make money, not friends!

[corpex]

On second thoughts I might try it but with Octane Booster added

[dingah2]

  corpex said:

On second thoughts I might try it but with Octane Booster added 

<{POST_SNAPBACK}>

...why? Surely adding octane booster at a cost of an additional 1/2 tank of fuel each time defeats the entire purpose of the exercise. One should never have to use additives if the car is running correctly in the first case unless you get stuck in the back blocks and cannot source decent premium fuel.

Dingah

[C.S.I]

I think the Boost 98 or whatever liberty sell down south (with the Ethanol) is cheaper than unleaded??

I got a shell card, but only good for Unleaded, pricks wont even shell out for 95.

So no chance of testing in the N/A.

[mickq]

Hey all,

Well I filled up (was near empty) late Friday night. Have done various driving types, mostly city. I have just filled up again tonight (had about 1/2 tank left but wanted to fill up for the week).

I couldnt find the correct spanner, so didnt disconnect the battery. I would have preferred to to give me an immediate comparison between it and normal Optimax. No matter....just did some K's and now have a better idea.

What I can say -

First impressions: my tank was near empty when I filled. Within about 5 minutes I could defintely notice a more responsive engine. It responded quicker and 'cleaner' to throttle changes. Much crisper, as someone above said.

Middle impressions: car seemed to be stumbling a bit and I though maybe something was wrong. Happened off and on. Then I worked out what it was - the TC was kicking in lightly at times when it normally wouldnt. that's a good sign potentially!

Longer impression (longer being all of 2 days!): after about 100km I reckon it *definitely* goes harder. I can tell the ECU has adjusted to the fuel. Its quite noticeable. It kicks in harder when you give it the boot. It pulls harder. It pulls smoother - the engine runs through the revs better and more cleanly. You can definitely "feel" the difference not only in terms of performance, but your engine runs a little differently once its adjusted to the fuel.

I say go for it guys. Give it a go - at least a tankfull to test it. If you have the right equipment, fill up, disconnect your battery for a few mins, put it back then drive it normally in various different ways (speeds, gears, revs) for a few mins while it adjusts to the new fuel, and then give it the boot and see if you come to the same conclusion I have.

I will definitely continue to use it - although I think once its introduced properly I wont be able to. My company fuel card is authorised for Optimax, and it seems during the trial they have decided that means Optimax extreme too. but if they introduce this fuel widely, then my fuel card will have to be specifically authorised for that product - which I dont think will happen.

For those with edits, once it looks like it will be properly released, I think you now have a PERFECT use for one of those memory slots! Id do:

95 Octane (or maybe standard unleaded if you are cruel)

98 Octane

100 Octane.

I have no doubt that not only will the edited cars produce more peak power, but also they will run better when it starts to get hot over summer.

[lightning_strike]

I put in half a tanx of extreme for the skids and it went marginally better. Had a full tank of extreme yesterday and it's noticably an improvement on regular optimax. There's better pickup through the rev range.

I'm a fan!

[mattyc]

Yep, filled up today on Extreme with a completely empty tank (2 km till empty).

I cant really tell much difference. Ill see if the econonmy has changed over the 1/2 tank.

92 unleaded was 109.5. Extreme was 122-something.

Bit of a rip of considering 5% of the product is local grown. they should introduce 5% eth. blend on the low range product so more people buy aussy fuel and the government subsidise it. meh.

[xxr64t]

just reading thru and seeing that after u fill up with ne optimax, do u have to disconnect the battery or what. Like will it do damage in near future or is it just for your ecu 2 read, please need more info if any1 knows??

[mickq]

  steven_p said:

just reading thru and seeing that after u fill up with ne optimax, do u have to disconnect the battery or what. Like will it do damage in near future or is it just for your ecu 2 read, please need more info if any1 knows??

<{POST_SNAPBACK}>

No you dont HAVE to disconnect the battery. But if you do, you will more quickly notice the new fuel as your engine will be forced to fully adapt to it instantly. Because of that, it allows you a better back to back comparison with the fuel you had in the car just before you refilled. I mentioned that just for those here who are hard-core fans and would like to notice it right away to make a quick comparison.

If you dont disconnect the battery, it will just take some kms before your car fully adjusts to the new fuel. Mine took about 50-100km I reckon but it may have been less.

Its not instant. Some improvements will be instant (improved throttle response and cleaner revving), but the biggest changes require your ECU to decide that yes the fuel has definitely changed and make changes (to the timing) - that particular change increases power. There are a bunch of reasons why car makers do this, but the main one is to ensure the ECU doesnt change timing a lot simply because a brief spurt of weird fuel came through or a short term false sensor reading.

If you arent comfortable disconnecting the battery then definitely dont do it. Just fill up with the new fuel and drive. You will notice some changes right away and some more over the next 100km of so.

There is nothing to indicate this fuel will cause any damage to this car. 5% ethanol is well within the 10% limit that most Aussie car manufacturers have now agreed is ok. There are a few fords that dont like any ethanol, but they seem to be mostly imported ones or similar. See the list someone posted a link to.

I am not expecting any problems. The only real problem with ethanol is it doesnt mix well with some plastics and rubber used in fuel lines, fuel pumps etc in certain cars or older cars (pre-1986 which means the introduction of leaded fuel caused them to use a different type of rubber/plastic).

From what I can see that problem should not occur with our cars.

[dal_dhillon]

hey mickq what about new cars My T is only done 1900KM so far is it to early to fill up the new optimax or should I wait until I have add 4000KM, to 5000KM's??

could be a silly question!! but I will ask any way

Dal.