supermarket petrol
Discussion
I wouldn't have believed how much difference the Octane rating on the petrol would have on my S....
Guy at the dealer said "yeah normal unleaded will be fine"......... b**l**t.... ran like c**p when cold and popped and spat through the exhaust... £25 of optimax and smoothness is resumed....
IIRC there are two different types of ECUs, where one type is prepared to handle 95 octane, but the other one isn't. You can check the serial number of the ECU to see which type you have. I'm not certain at the moment what the first figures should be, maybe it was 88B? Maybe there is some other thread covering this subject. I'll have a look.
\ Johan
\ Johan
Yes, of course. This is not true if you have had your ECU remapped. 
I would actually fancy a trip to Austec myself.
But, if you have a standard ECU it is possible that you can run the car on 95 octane fuel with no problem. Mine runs fine on both 95 and 98, although it feels more powerful on 98. So the general advice should probably be to run the car on 98 octane.
And if your car does not run fine on 95 octane, it may be caused by that your ECU is optimised for 98 octane by remapping or by that it is of the standard type that is not adapted to use 95 octane.
Johan
>> Edited by Johan G on Tuesday 29th June 08:52
I would actually fancy a trip to Austec myself.
But, if you have a standard ECU it is possible that you can run the car on 95 octane fuel with no problem. Mine runs fine on both 95 and 98, although it feels more powerful on 98. So the general advice should probably be to run the car on 98 octane.
And if your car does not run fine on 95 octane, it may be caused by that your ECU is optimised for 98 octane by remapping or by that it is of the standard type that is not adapted to use 95 octane.
Johan
>> Edited by Johan G on Tuesday 29th June 08:52
Mine runs 'OK' on 95RON, but does appreciate the super-unleaded. I've also tried optimax, but didn't notice any power increase to justify price premium over Sainsbury's 'super'.
Must admit I forgot to compare mpg to see if Optimax more efficient - but to be honest, I don't really give a sh*t as long as the economy is reasonable.
IMHO Sainsbury's 'super' is the best compromise - definite improvement to drive, but not much more in cost than 'ordinaire'
Must admit I forgot to compare mpg to see if Optimax more efficient - but to be honest, I don't really give a sh*t as long as the economy is reasonable.
IMHO Sainsbury's 'super' is the best compromise - definite improvement to drive, but not much more in cost than 'ordinaire'
the supermarket was tesco... not sure about which ECU it has..... noticed the biggest difference when the engine is cold.... on tesco petrol really had to keeps the revs up when first running.... optimax no such issues... haven't got a sainsbury or BP local and its not having safeways!!!! so shell it will have to be...
I won't use anything other than Esso Placebo Plus! Last time I put normal petrol in, all the wheels fell off and I could only get Brotherhood of Man on the radio.
Now that I stick to Placebo Plus I find that I'm regularly breaking the sound barrier, and the car's often already running and warmed up when I opent the garage in the morning.
I'll get my coat!
Now that I stick to Placebo Plus I find that I'm regularly breaking the sound barrier, and the car's often already running and warmed up when I opent the garage in the morning.
I'll get my coat!
I had a look in 'The Bible' last night, and I can confirm that ECU part number that begins with 88BB is the one that needs no modification to cope with 95 octane. The one with part number beginning with 86GB can be adjusted by connecting some of the inputs to earth. Details on this can be found in 'The Bible'.
It should also not be forgotten that your ECU might be optimised for 98 octane, as mentioned previously on this thread. Or it can also already have been adjusted by connecting wires to earth and so on...
Fun how petrol is named in the UK! Here in Sweden the oil companies mostly just state the octane figure.
Johan
Edited to remove silly joke
>> Edited by Johan G on Wednesday 30th June 11:56
It should also not be forgotten that your ECU might be optimised for 98 octane, as mentioned previously on this thread. Or it can also already have been adjusted by connecting wires to earth and so on...
Fun how petrol is named in the UK! Here in Sweden the oil companies mostly just state the octane figure.
Johan
Edited to remove silly joke
>> Edited by Johan G on Wednesday 30th June 11:56
RichardR said:
I won't use anything other than Esso Placebo Plus! Last time I put normal petrol in, all the wheels fell off and I could only get Brotherhood of Man on the radio.
Now that I stick to Placebo Plus I find that I'm regularly breaking the sound barrier, and the car's often already running and warmed up when I opent the garage in the morning.
I'll get my coat!
pepsi challenge?
RichardR said:
I won't use anything other than Esso Placebo Plus! Last time I put normal petrol in, all the wheels fell off and I could only get Brotherhood of Man on the radio.
Now that I stick to Placebo Plus I find that I'm regularly breaking the sound barrier, and the car's often already running and warmed up when I opent the garage in the morning.
I'll get my coat!
oooh cutting...!
Mne has now been fully setup on 97... I've put in 95 once since then, and it ran like a dog.. lurching all over the gaff...
To be fair though I've used Saino's 97 and it's been fine...
Podie said:
It's that TVR thing, they're all different.
Mine runs best on Tesco 95 and is awful on optimax, ultimate and placebo plus
Andy
Esso - put a tiger in your tank...
Andyf007 - put a guinea pig in your tank
I dread to think how much money you've spent just to get performance like mine
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