As it says, how many of you have found that Optimax made little or no difference (sorry to dig up another Optimax thread)? I tried it a few months ago, reset the ECU and used it for a few weeks but didn't seem to notice any difference .Thinking of giving it another go ,but thought I would see what you lot think .
Standard UK MY99
Thanks
Dave.



[Edited by IN THE STICKS - 6/6/2003 10:15:27 AM]

 

I would say that i havent noticed much of a difference between Esso SUL & optimax,(STiV) not totally sure but does the UK99 ecu learn upwards though??

 

no difference whatsoever in mine. To be honest, I have never noticed any difference on the few occasions that I've had to put some NUL in.

Steve

 

I think the MY99 ECU does (but I stand to be corrected ) but I did do the famous ECU reset at the time .
Dave.

 

Dave, doing an ecu reset will only put your ecu back to the factory settings i.e 95Ron, hence prob why your getting no gain?? but if it is capable off learning upwards, then maybe given time....
you might gain

 

It shows on the Knocklink Dave, thats why I stick with it.

Les

 

I notice difference but have mapped for optimax.

 

Thanks Andy , so perhaps I'll give it another go and stick with it without a reset and see if it 'learns'
Thanks chaps
But it still seems a few of you notice no change though !

[Edited by IN THE STICKS - 6/6/2003 10:44:25 AM]

 

i wouldnt of thought the difference would be as noticable on UK cars compared to jap cars, as UK is mapped for 95/98, jap is mapped for 100

 

i do notice some difference in fuel economy and it seems to run a little smoother but the latter could just be my imagination.
i run a standard MY97 uk turbo

 

I should have said that while I cant notice any difference performance-wise I definitely get better mpg running SUL or optimax so presumably the engine is running more efficiently.

Steve

 

found sul worse mpg than nul and no performance difference - test done as scientifically as poss - same route, same driving style, enough fuel between the switch for the ecu to learn:-

http://www.riftzone.fsnet.co.uk/scoobown.xls

 

Did you know that Optimax has only been tested by Shell comparing it to normal unleaded and no tests have been carried out comparing it to super unleaded....

Andy

 

Interesting reading thanks chaps .

 

fek all difference in my P1

 

How about Optimax against Normal unleaded ?...big difference or not ?

 

There may be no great benefit noticeable benefit when driving, but for those owners running more boost or modding the extra octane rating does make a difference.

Thats why cars that are mapped to run optimax only and large doses of booster get better results than those not, bob rawle will confirm that running optimax (and booster) will allow him to increase ignition advance far beyond running nul (which he would probably not map for!).

Think of it as a safety measure not necessarily a performance increasing one.

[Edited by ptholt - 6/6/2003 1:43:38 PM]

 

pt,
I have to agree with that but the problem is that that is not how Shell are marketing Optimax though.

Shell appear to be marketing it more along the lines of it will clean up your engine and provide better responsivness from the cleaning effect rather than from the octane rating but most 'performance car enthusiasts' tend to expect the increase in performance to come from the higher octane which may not be the case.

I've asked Shell quite a few questions about this and I am still awaiting a few responses.

Andy

 

ahhh im with you now, i took the above the wrong way.
admittedly in my own sti5 there was not much noticable difference in the driving seat, the only time any obvious improvement coming from the increased advance it allowed the car to run.

 

I use 100 RON Vpower and have noticed no difference from Optimax 99 RON or SUL 98 RON.

 

I "thought" MY02 went better on Optimax in preference to unleaded

but "I know" it goes best on SUL. (deffo feels perkier - can I say that?)

 

No noticeable difference between SUL & Optimax, I stick to Optimax, as its a lot cheaper round these parts

in my old MY99 Sport, I noticed quite a difference between SUL & NUL tho

 

Hi All

I got a 94 import, whats the best for me to use. Do i have to reset the ecu just put optimax in 10 mins ago.

 

I had to put normal unleaded in once and it didnt like it one bit. Was poppin, bangin and flamin.

 

I put Optimax in and max boost decreased by 0.1bar. Car was down on power. Emptied tank (only used one tank of Optimax) and put SUL in and reset ECU and car back to normal and boost pressure restored. Car always run on SUL normally.
This was a MY99 with PPP.

 

Anyone tried using Optimax or similar with an Ecotek device? Or anyone tried it without any octane boosting?

Whats the price of getting an ECU mapped to 100RON?

 

I don't think anyone would chance mapping a punters car to run on 100 ron in this country.

Too risky.

You may just forget to put that octane booster in.Go for a Razzz.

Pop goes the weasel.

 

My 03 WRX is much smoother and has better throttle response with Optimax compared to Normal Unleaded. Not much of a difference with other companies SUL.

 

it made a huge differance on my golf vr6. it flies up to the red line in 3rd (110mph)...in fact i've been using optimax ever since.

 

nicky Is that compared with normal unleaded or super ?