Use Optimax,it IS the best fuel at 98.6ron......
17 October 2001, 02:05 PM
#1
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It does make a difference for the better.Whoever said it wasnt any good and made the car pink is on crack!
My cossie has certainly been smoother and more responsive on the stuff.....so use it,especially tuned motors.
You cant knock them Ferrari guys!!!
My cossie has certainly been smoother and more responsive on the stuff.....so use it,especially tuned motors.
You cant knock them Ferrari guys!!!
17 October 2001, 02:10 PM
#2
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Ima,
I must be on crack then! Mt mates car must be on crack! Dingy & Shaggy must be on crack! Harvey Gibbs (who has done a back to back live map on the engine dyno) must be on crack!
If it works for you, then b happy!! But we aint all on crack!
Shaun.
For FORD stuff, including other useful info www.the-real-deal.co.uk
For the ultimate in BBS, try my ABUSE-A-THON at http://pub36.ezboard.com/btherealdeal60756
I must be on crack then! Mt mates car must be on crack! Dingy & Shaggy must be on crack! Harvey Gibbs (who has done a back to back live map on the engine dyno) must be on crack!
If it works for you, then b happy!! But we aint all on crack!
Shaun.
For FORD stuff, including other useful info www.the-real-deal.co.uk
For the ultimate in BBS, try my ABUSE-A-THON at http://pub36.ezboard.com/btherealdeal60756
17 October 2001, 02:15 PM
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Bit of a sweeping statement 
I was happy to trial it (MY00), and have had no problems (yet). Some people have had problems. Then again, who is to say that other problems have not been seen running on SUL or UL ?
Seeing as though each car may be slightly different within manufacturers tolerances, I think it's a bit harsh to say they are all on crack. I read it as though it was meant in jest, and it would be better net-iquette to use the ol smileys to emphasise the jest
Having seen the advert on how it cleans deposits on the pistons and the like, my only worry was would it eat into/dissolve anything else that I didn't want it to?
No war, just helping with the emoticons
[img]images/smilies/mad.gif[/img]
I was happy to trial it (MY00), and have had no problems (yet). Some people have had problems. Then again, who is to say that other problems have not been seen running on SUL or UL ?
Seeing as though each car may be slightly different within manufacturers tolerances, I think it's a bit harsh to say they are all on crack. I read it as though it was meant in jest, and it would be better net-iquette to use the ol smileys to emphasise the jest
Having seen the advert on how it cleans deposits on the pistons and the like, my only worry was would it eat into/dissolve anything else that I didn't want it to?
No war, just helping with the emoticons
[img]images/smilies/mad.gif[/img]
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17 October 2001, 02:27 PM
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Ohmygod,
The cossie boys cars have gone bang again..... this time its the "crap 98.6 fuel did it" excuse.
Add that to the long list
Had nothing but a good time using the stuff with the MY01 PPP!!! (apart from buggered ECU )
Jza
The cossie boys cars have gone bang again..... this time its the "crap 98.6 fuel did it" excuse.
Add that to the long list
Had nothing but a good time using the stuff with the MY01 PPP!!! (apart from buggered ECU
)Jza
17 October 2001, 02:28 PM
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I have been using it for a month or so now and I have to say that I too, am dubious. I thought that it was bound to be better, but felt more of a 'placebo' effect than anything IMO, unfortunatly. She seems no different. I used Millers with normal SUL and with Optimax and 1 bad thing certainly IMO is that I get virtually no more pops&bangs. Maybe 1 a day now. With SUL before, the flames were a free-flowing baby!
Cheers,
Nick.
Cheers,
Nick.
17 October 2001, 04:23 PM
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Mr Footlong...
Not wanting to take the p1ss but i hardly think that the fact that your car no longer shoots flames and missfires constitutes "Optimax is crap"
Can we have some actual facts rather than "my car det'd and therefore the petrols crap"/bloke down pub said it blew up his cossie type rubbish???????
The only FACT i can see is that the petrols got more RON. As the idea of fuel additives is to add RON to the petrol, how can this be a bad thing.
Or are peoples cars so far mapped to 97RON SUL crap that they can't take a bit more DA-DO-RON RON??
Jza
Not wanting to take the p1ss but i hardly think that the fact that your car no longer shoots flames and missfires constitutes "Optimax is crap"
Can we have some actual facts rather than "my car det'd and therefore the petrols crap"/bloke down pub said it blew up his cossie type rubbish???????
The only FACT i can see is that the petrols got more RON. As the idea of fuel additives is to add RON to the petrol, how can this be a bad thing.
Or are peoples cars so far mapped to 97RON SUL crap that they can't take a bit more DA-DO-RON RON??
Jza
17 October 2001, 04:35 PM
#12
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Jza,
So what about ALL THE EXTRA cleaning additives that Optimax has compared to straight SUL??
I can only speak from experience of myself and others that I know that have. The petrol station that I used it from, had SUL in the tanks before, so the theory of mixing with other crap petrol can be discounted....as my mates car doesn't det on SUL, neither did Craigs.
Like I said, if you think it's good use it. I will personally wait until it's been around abit, and you lot have done the testing!
There is no gain on my car..........but thats probably because the car is mapped for 97 ron.
So what about ALL THE EXTRA cleaning additives that Optimax has compared to straight SUL??
I can only speak from experience of myself and others that I know that have. The petrol station that I used it from, had SUL in the tanks before, so the theory of mixing with other crap petrol can be discounted....as my mates car doesn't det on SUL, neither did Craigs.
Like I said, if you think it's good use it. I will personally wait until it's been around abit, and you lot have done the testing!
There is no gain on my car..........but thats probably because the car is mapped for 97 ron.
17 October 2001, 04:37 PM
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JZA,
how good is your organic chemistry?
I am just wondering how much you actually know about fuel vis a vis ron and mon ratings.
it isnt as easy as more ron = better.
Its like more horsepower does not equal faster, you have to considr things like power delivery, torque weight, traction etc.
Given that some have reported being able to advance the timing whereas others have reported det, I reckon there is not an even standard of fuel across the country due to different supply routes.
On the whole the cost and advertising taht has gone into I would guess that it is better, with those having had bad experiences so far just being unlucky.
Or perhaps the first few tanks have flushed teh crappy build ups through the engine and once cleaned out things will improve.
how good is your organic chemistry?
I am just wondering how much you actually know about fuel vis a vis ron and mon ratings.
it isnt as easy as more ron = better.
Its like more horsepower does not equal faster, you have to considr things like power delivery, torque weight, traction etc.
Given that some have reported being able to advance the timing whereas others have reported det, I reckon there is not an even standard of fuel across the country due to different supply routes.
On the whole the cost and advertising taht has gone into I would guess that it is better, with those having had bad experiences so far just being unlucky.
Or perhaps the first few tanks have flushed teh crappy build ups through the engine and once cleaned out things will improve.
17 October 2001, 04:38 PM
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Whilst I do use Optimax and agree it's better, I do seem to recall a fiasco with a Shell premium petrol about 5 or 6 years ago. I seem to remember worn piston bores bores and cracked heads were a factor. Anyone else remember it or am I going senile?
Dean
Dean
17 October 2001, 04:39 PM
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Are we ALL SURE that Optimax is 98ron??????? I know for a fact that the Cossie 350bhp conversion lost between 10-20bhp, when the petrol switched from 98 to 97. A well known tuner tried to live map an engine on the new Optimax stuff, and believe it or not the figures were worse, than with SUL!!
17 October 2001, 04:57 PM
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Optimax is officially 98.6RON. Mark Shead from MADevelopments did a quick test where an escort cossie came to him detting its head off and he filled the half full SUL tank with Optimax and the det instantly dissapeared and that was without having to retard any igntion!!!!
Knock Sensors are far too sensitive and pick up knocks from all over the place, the det check Mark uses ONLY picks up det from the engine and with Optimax, the det had gone!
As for Harvey, is official stance is not that its no good, he just isnt saying either way.
and that was without having to retard any igntion!!!! Knock Sensors are far too sensitive and pick up knocks from all over the place, the det check Mark uses ONLY picks up det from the engine and with Optimax, the det had gone!
As for Harvey, is official stance is not that its no good, he just isnt saying either way.
17 October 2001, 05:19 PM
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Until it's been proven, i won't be going back to Optimax. I've tried it from stations around the country - possibly 7 or 8.
Car started detting when i first started using it - now on Esso SUL it's gone in day to day driving.
Not scientific, but if my car dets with it in, i won't be using it - simple really.
Car started detting when i first started using it - now on Esso SUL it's gone in day to day driving.
Not scientific, but if my car dets with it in, i won't be using it - simple really.
17 October 2001, 05:33 PM
#18
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"Knock Sensors are far too sensitive and pick up knocks from all over the place"
That's why there is a sensitivity adjustment on them!!!! Must of been a fluke then, because Powerstation tested a Knocklink (without adjusting it) and it was ABSOLUTELY **** on with there DETCANS!!!! It ALSO GREATLY depends on where the sensor is mounted.
I for one will be fitting a KnockLink to my Cossie.
As regards to the official statement of Optimax being 98.6, is only a statement mate. The fact that a customers car was detting on SUL doesnt mean that Optimax is all it's cracked up to be. Several tests were made by the weights and measures body, and it proved that SUL ranged from 95 octane up to 97 octane.
If some tuner can tell me that they have back to back live mapped an engine, on both SUL and Optimax, and Optimax produces alot more power like 98 used to...........then I will take heed.
That's why there is a sensitivity adjustment on them!!!! Must of been a fluke then, because Powerstation tested a Knocklink (without adjusting it) and it was ABSOLUTELY **** on with there DETCANS!!!!
It ALSO GREATLY depends on where the sensor is mounted.I for one will be fitting a KnockLink to my Cossie.
As regards to the official statement of Optimax being 98.6, is only a statement mate. The fact that a customers car was detting on SUL doesnt mean that Optimax is all it's cracked up to be. Several tests were made by the weights and measures body, and it proved that SUL ranged from 95 octane up to 97 octane.
If some tuner can tell me that they have back to back live mapped an engine, on both SUL and Optimax, and Optimax produces alot more power like 98 used to...........then I will take heed.
17 October 2001, 05:46 PM
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Arent the pre MY01 cars not "active" in terms of ignition/fuel etc. Dont you need to reset the ECU to notice the difference - im sure if you dont it goes along thinking its got 95ron in it and therefore runs badly????
My MY01 presumably soaks up the 98.6 and says "this is great" and performs better???????
Is the problem not with the fuel but with the ECU not "learning"???
Jza
My MY01 presumably soaks up the 98.6 and says "this is great" and performs better???????
Is the problem not with the fuel but with the ECU not "learning"???
Jza
17 October 2001, 05:53 PM
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I thought the MY99 onwards had the learning ECUs but I could be wrong (for a change )
Mine does feel smoother, but I might use Optimax occasionally just to clean the pistons Haven't seen what it would be like going back to plain old UL yet.....
)Mine does feel smoother, but I might use Optimax occasionally just to clean the pistons
Haven't seen what it would be like going back to plain old UL yet.....
17 October 2001, 06:01 PM
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Hanslow,
The 98-99 (and possibly 97) ECU's advance the ignition slowly over a couple of tanks if better fuel is put in. The MY01 advances almost "on-the-fly" (apparently) and the pre 97 basically need an ECU reset to advance again after having retarded.
Jza, if the car was running 95 or 97 previously then putting 98 at worse case should only make no difference, not make it run any worse but if you could put < 95RON in then that *would* start running badly (all in theory of course).
Matt
The 98-99 (and possibly 97) ECU's advance the ignition slowly over a couple of tanks if better fuel is put in. The MY01 advances almost "on-the-fly" (apparently) and the pre 97 basically need an ECU reset to advance again after having retarded.
Jza, if the car was running 95 or 97 previously then putting 98 at worse case should only make no difference, not make it run any worse but if you could put < 95RON in then that *would* start running badly (all in theory of course).
Matt
17 October 2001, 06:03 PM
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Seems to give smoother low rev pick up in my MY01 but I don't notice any more power once things get on the boil. As it's near 84p round here I will think carefully before using it anymore.(just my pennies worth)
LoFi
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17 October 2001, 09:11 PM
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QUOTE:
Ima,
I must be on crack then! Mt mates car must be on crack! Dingy & Shaggy must be on crack! Harvey Gibbs (who has done a back to back live map on the engine dyno) must be on crack!
If it works for you, then b happy!! But we aint all on crack!
Shaun.
END QUOTE
Shaun, as far as I know, Harvey didn't back-to-back live map with Optimax. He and Ahmed live mapped a rally engine on SUL. Then they swapped to Optimax and reran for a power reading on the engine dyno. The result was that it didn't appear to do any harm, but didn't increase the power fig's either.
Bill
Ima,
I must be on crack then! Mt mates car must be on crack! Dingy & Shaggy must be on crack! Harvey Gibbs (who has done a back to back live map on the engine dyno) must be on crack!
If it works for you, then b happy!! But we aint all on crack!
Shaun.
END QUOTE
Shaun, as far as I know, Harvey didn't back-to-back live map with Optimax. He and Ahmed live mapped a rally engine on SUL. Then they swapped to Optimax and reran for a power reading on the engine dyno. The result was that it didn't appear to do any harm, but didn't increase the power fig's either.
Bill
18 October 2001, 07:59 AM
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I previously ran SUL + Millers until the local Shell station started selling Optimax.
I have not used anything but Optimax + Millers since.
I'm not sure that I've really noticed any improvement to be honest though I have not done an ECU reset (it's an STi4).
Initially I thought there was better pickup low down but certainly there was no startling "blew my socks off" increase in performance.
Just the other day I drove the car with the radio off and thought I heard some pinking when I nailed it, and this was around the medium boost levels! Fact is I don't have a knock link and I'm not sure.
Something I found interesting a while back was Pete Croney's findings when he did some ECU testing on his MY 01 WRX.
As I recall, he found that he could get more ignition advance using 98 RON SUL from Europe than UK 97RON with OB (theoretically 99RON?).
My point is (and I think I'm agreeing with another post here although I can't review the topic to find out who!) that pure RON doesn't always matter so much as fuel quality.
I've always been sceptical that any octane booster can give a magical increase despite being an avid user of the stuff. I just take the view that it shouldn't be doing any harm.
I wonder therefore if Optimax also can be all things to every car as claimed?
I for example run a Scoobysport D/P which some people think can cause leaning out. I didn't appear to have any problems with SUL + OB, but maybe Optimax doesn't work so well with this type of setup and the people on here who are experiencing problems are those that are running one of the many different setups that are out there (induction kits, D/Pipes, boost controllers etc?)
Nothing scientific about my views, just food for thought until someone comes up with some difinitive test results.
Neil.
I have not used anything but Optimax + Millers since.
I'm not sure that I've really noticed any improvement to be honest though I have not done an ECU reset (it's an STi4).
Initially I thought there was better pickup low down but certainly there was no startling "blew my socks off" increase in performance.
Just the other day I drove the car with the radio off and thought I heard some pinking when I nailed it, and this was around the medium boost levels! Fact is I don't have a knock link and I'm not sure.
Something I found interesting a while back was Pete Croney's findings when he did some ECU testing on his MY 01 WRX.
As I recall, he found that he could get more ignition advance using 98 RON SUL from Europe than UK 97RON with OB (theoretically 99RON?).
My point is (and I think I'm agreeing with another post here although I can't review the topic to find out who!) that pure RON doesn't always matter so much as fuel quality.
I've always been sceptical that any octane booster can give a magical increase despite being an avid user of the stuff. I just take the view that it shouldn't be doing any harm.
I wonder therefore if Optimax also can be all things to every car as claimed?
I for example run a Scoobysport D/P which some people think can cause leaning out. I didn't appear to have any problems with SUL + OB, but maybe Optimax doesn't work so well with this type of setup and the people on here who are experiencing problems are those that are running one of the many different setups that are out there (induction kits, D/Pipes, boost controllers etc?)
Nothing scientific about my views, just food for thought until someone comes up with some difinitive test results.
Neil.
18 October 2001, 08:03 AM
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So the ability to increase advance in all boost areas is not an objective test?
The det line in my car - which is heavily tuned is much improved with Optimax.
SUL with good octane booster will be a shade better than Optimax.
Trout
The det line in my car - which is heavily tuned is much improved with Optimax.
SUL with good octane booster will be a shade better than Optimax.
Trout
18 October 2001, 09:11 AM
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Trout.
That's exactly my point. Your car is "heavily modified" which, by the sounds of it, includes a mappable ECU?
You personally have had good results, but what of the other guys who have messed with induction/exhaust combinations (i.e. me!) which could result in the pinking worries and differing observations in performance?
A definitive test in my mind is a range of cars (various mods) tested back to back with the various fuel combinations.
I'm really staying very non-committal about all this and not making any claims, just trying to offer some ideas on the why there are differing views on this fuel.
Incidentally, have you tried the Optimax with OB combination?
It would be good to know if you could push your det line even further with that combination.
Neil.
That's exactly my point. Your car is "heavily modified" which, by the sounds of it, includes a mappable ECU?
You personally have had good results, but what of the other guys who have messed with induction/exhaust combinations (i.e. me!) which could result in the pinking worries and differing observations in performance?
A definitive test in my mind is a range of cars (various mods) tested back to back with the various fuel combinations.
I'm really staying very non-committal about all this and not making any claims, just trying to offer some ideas on the why there are differing views on this fuel.
Incidentally, have you tried the Optimax with OB combination?
It would be good to know if you could push your det line even further with that combination.
Neil.