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Will the wrong fuel damage anything ?

ORIGINAL: 944 S2

ORIGINAL: slim_boy_fat

Very funny..
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Come on i had to ask, the handbook says 95ron
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Take that as a minimum, i doubt you would notice any difference. But the opticon does have better cleaning properties according to someone whose name i forget. [:D]

 
p.s. did you know there is someone on the forum with the name 944s2, lower case 's'. Oh he's not going to be happy, not only that but he's from the briggs!!!!!!
 

ORIGINAL: slim_boy_fat

p.s. did you know there is someone on the forum with the name 944s2, lower case 's'. Oh he's not going to be happy, not only that but he's from the briggs!!!!!!
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YES i did notice after i registered, never mind i'm sure he isn't as bothered sa you are [;)]
 

ORIGINAL: slim_boy_fat

p.s. did you know there is someone on the forum with the name 944s2, lower case 's'. Oh he's not going to be happy, not only that but he's from the briggs!!!!!!
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I actually thought it was Dougie at first. You west coasters aren't very original, are you (says me using my real name).

I find after a few tanks my S2 runs noticeably better on Optimax, although I thought Esso Supreme or whatever was even better.
 

ORIGINAL: Fen


ORIGINAL: slim_boy_fat

p.s. did you know there is someone on the forum with the name 944s2, lower case 's'. Oh he's not going to be happy, not only that but he's from the briggs!!!!!!
Click to expand...

I actually thought it was Dougie at first. You west coasters aren't very original, are you (says me using my real name).

I find after a few tanks my S2 runs noticeably better on Optimax, although I thought Esso Supreme or whatever was even better.
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Have you ever used a valve cleaner or injector cleaner on your cars fen ?

 
Nope. I have a receipt for an ultrasonic injector clean by the last owner as part of a long drawn out attempt to cure poor running but that's going to be 50k+ ago.

I guess a clean may a be fair bit of what's making the difference but I swear I could tell straight away if somebody filled it up with 95RON so now it is clean the extra bang is noticeable too.
 
So I take it from this email thread so far that some of you think that 97/98 RON fuel is not worth the money? I've been running my on std unleaded so far but am considering using higher octane going forward but am too worried obout any adverse affects.

I've heard it does give you better fuel economy also but not sure if the economics against the 5p/ltr extra cost would work out.

Cheers.
 
I get about 3% better fuel economy on Optimax but the car is definitely more lively. Bear in mind though mine has a Blitz chip that is mapped for SUL.
 

ORIGINAL: sawood12
So I take it from this email thread so far that some of you think that 97/98 RON fuel is not worth the money
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I would say it's not worth it for a standard car, but it is in a modified one.

My S2 does a little more mileage per tank with Optimax, but it costs 8% more so it's not worth it IMHO. Modified cars can make extra use of the higher RON value and will therefore be able to extract more power from it which is why I use it all the time in the Turbo [:)]
 
Ive tried Optimax for about the last 6 tanks of fuel and have noticed no difference at all in economy or performance so Im going to back to regular unleaded. I think my car has been run on standard unleaded for quite a while and therefore with its mileage Optimax is not going to make a great deal of difference at this stage IMO.
 
Don't forget that a higher octane fuel only prevents detonation/pre ignition or knock (whatever you want to call it)

It DOES NOT mean the fuel will produce more power.

Its does as Paul says allow the engine to be tuned to produce more power without the engine knocking. Unless the engine can adapt via the ECU (or has a chip that has ben adapted) to the higher octane fuel it will not make any more power.

Optimax has other apparent properties which might make it worth while using. Primarily it is supposed to clean the engine very efficiently. There are magazine tests floating about which show this.

I use Optimax in mine but again its in a higher state of tune that standard which i think warrants all the help it can get.

 

ORIGINAL: slim_boy_fat

Don't forget that a higher octane fuel only prevents detonation/pre ignition or knock (whatever you want to call it)

It DOES NOT mean the fuel will produce more power.

Its does as Paul says allow the engine to be tuned to produce more power without the engine knocking. Unless the engine can adapt via the ECU (or has a chip that has ben adapted) to the higher octane fuel it will not make any more power.

Optimax has other apparent properties which might make it worth while using. Primarily it is supposed to clean the engine very efficiently. There are magazine tests floating about which show this.

I use Optimax in mine but again its in a higher state of tune that standard which i think warrants all the help it can get.
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HIGHER STATE OF TUNE - LOLsssss

Never heard you call it that before [;)]
 
Well i've given Optimax a go this tank. Can't say I notice much difference in performance but I will give it a few tankfulls to assess fuel economy. I don't know if it's phycological but I think the engine might be running a bit more smoothly, it seems to have a silky feel to it that I havn't noticed before - not that it was particularly rough on normal unleaded.
 
Another vote for Optimax here. I found fuel economy marginally improved - though not enough to offset the extra cost - and my S2 felt a little more lively and smooth. Subtle (and possibly psychosomatic) but worth it to me - works out about £10 a month more for me, doing 1K a month.

And presumably will be of aid when/if I decide to chip it.
 
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