95 or 97 ron Fuel?
95 or 97 ron Fuel?
Author
Discussion

Iaing01

Original Poster:

421 posts

240 months

Monday 22nd October 2007
quotequote all
Read the owners manual the other day and it states that the car should be run on 95 ron fuel.

Was just wondering what everyone uses. I normally run my cars on Optimax, will this harm the engine in the noble? I take it its mapped for 95 ron fuel not 97?

Iain

snuffy

13,220 posts

313 months

Monday 22nd October 2007
quotequote all
Iaing01 said:
Read the owners manual the other day and it states that the car should be run on 95 ron fuel.
That's not what my owners manual says. It says to use 98 but it's okay to use 95 if you can't get 98.

I normally use Optimax ( V-Power as it's called now ) or BP Ulitimate or Esso super. I have to say I can't really tell any difference with any of those or 95.

ajg31

1,455 posts

236 months

Monday 22nd October 2007
quotequote all
95 will probably make the car start pinking when used hard. i have used 95 as a get me out of shit before but always taken in steady. I dont suppose the car is clever enough to have two maps to lower/alter itself for the lesser fuel?

Iaing01

Original Poster:

421 posts

240 months

Monday 22nd October 2007
quotequote all
Its an M400, the owners manual that comes with it is for a M12 GT0. I have it in front of me and I quote...

Fuel Type

You noble M12 has been designed to run exclusively on unleaded fuel. Its is fitted with a narrow fuel filler neck, making it compatible for unleaded pumps only.

To achieve maximum performance and efficiency, it is recommended that the vehicle is refuelled with standard (95 RON) unleaded fuel.

Iain

snuffy

13,220 posts

313 months

Monday 22nd October 2007
quotequote all
Iaing01 said:
Its an M400, the owners manual that comes with it is for a M12 GT0. I have it in front of me and I quote...

Fuel Type

You noble M12 has been designed to run exclusively on unleaded fuel. Its is fitted with a narrow fuel filler neck, making it compatible for unleaded pumps only.

To achieve maximum performance and efficiency, it is recommended that the vehicle is refuelled with standard (95 RON) unleaded fuel.

Iain
That's odd then.

My M12 manual says :

"You noble M12 has been designed to run exclusively on unleaded fuel. Its is fitted with a narrow fuel filler neck, making it compatible for unleaded pumps only.

To achieve maximum performance and efficiency, it is recommended that the vehicle is refuelled with super unleaded (98 RON) fuel. However, in circumstances where this is not avaiable, the vehicle will perform satisfactorily on standard (95 RON) unlead fuel."

I don't know then.



ThatPhilBrettGuy

11,810 posts

269 months

Monday 22nd October 2007
quotequote all
All Nobles from the 3R onwards were mapped for 95. There's no knock sensor so 97 or more will give you nothing (I proved this on my 500bhp+ machine), so unless the mapping has been played with 95 is fine.

T&T

107 posts

238 months

Monday 22nd October 2007
quotequote all
Just to confuse you ,my m12 manual states

"to achieve maximum performance..... refuel with super unleaded (98 RON).

However when this is not available your vehicle will operate satisfactorily on standard 95 RON


I've had to refuel halfway thru a trackday on 95 ron , and I can't honestly say I noticed any difference...however I do use 98 as the norm . I guess the thoughts behind this are to protect against pre-detonation when using 95 ron . ( although the knock sensor should retard the ignition should this happen anyway).

I'd use 98 or higher if you drive it hard IMHO.

Shegs1

90 posts

238 months

Monday 22nd October 2007
quotequote all
Hi mate, i use Shell V Power all the time and my car runs sweet. A higher octane is supposed to be better for high performance cars, im not totally sure if it does make significant differences or not. Stick to the V Power and you wont go wrong!! All the best with your lovely new car and happy trouble free motoring. Nobles are for cool people!!! he he

T&T

107 posts

238 months

Monday 22nd October 2007
quotequote all
Phil, you are the oracle...

"All Nobles from the 3R onwards were mapped for 95. There's no knock sensor so 97 or more will give you nothing (I proved this on my 500bhp+ machine), so unless the mapping has been played with 95 is fine."

Ignore my b0llx then , I must have been given an 'old stock' manual.

The money I could have saved on using 95 RON could have paid for my 3R to be remapped !!

mgbond

6,749 posts

261 months

Monday 22nd October 2007
quotequote all
Shegs1 said:
Hi mate, i use Shell V Power all the time and my car runs sweet. A higher octane is supposed to be better for high performance cars, im not totally sure if it does make significant differences or not. Stick to the V Power and you wont go wrong!! All the best with your lovely new car and happy trouble free motoring. Nobles are for cool people!!! he he


This has been talked about before.

I understand the car is set-up for 95 and if anything higher is used it will make no difference as the cars have no knock sensor. The choice is how clean is the fuel. I use V-Power (for the air miles and it seems to be cheaper than BP Ultimate).

Bondy

gadgeroonie

5,362 posts

265 months

Monday 22nd October 2007
quotequote all
Bondy - yours is mapped to run on minimum 97 ron

ThatPhilBrettGuy

11,810 posts

269 months

Monday 22nd October 2007
quotequote all
[quote=T&T]Phil, you are the oracle...

"All Nobles from the 3R onwards were mapped for 95. There's no knock sensor so 97 or more will give you nothing (I proved this on my 500bhp+ machine), so unless the mapping has been played with 95 is fine."

Ignore my b0llx then , I must have been given an 'old stock' manual.

The money I could have saved on using 95 RON could have paid for my 3R to be remapped !!

[/quote]Well, there is on reason to use 97+, that's if you think the 95 available isn't great. Have a look at this http://www.btinternet.com/~madmole/Reference/RONMO...

Still, I've had no issues and I know Trevor mapped mine for 95. I seem to remember him saying for the small amount of extra go he could get mapping with 97+, it wasn't worth the pain of trying to find the fuel...or risking it if you have no choice.

AMG Merc

11,955 posts

282 months

Monday 22nd October 2007
quotequote all
ajg31 said:
95 will probably make the car start pinking when used hard. i have used 95 as a get me out of shit before but always taken in steady. I dont suppose the car is clever enough to have two maps to lower/alter itself for the lesser fuel?
The "car" is quite clever actually. If you ever get the chance speak with Trevor at Rousch. She won't pink with 95 RON. Mr. L. Noble told me personally during the old days when he was permitted to be chat directly with the Nobility.

mgbond

6,749 posts

261 months

Monday 22nd October 2007
quotequote all
gadgeroonie said:
Bondy - yours is mapped to run on minimum 97 ron


I know I was just talking about std cars.

Bondy

MadMacMcMad

1,267 posts

283 months

Monday 22nd October 2007
quotequote all
Don't know what it says in the manual, but I have always ran 95, but recently filled up with 97. I might have been dreamin, but I am sure there was a marked different in mid range.
No proof tho.

mr2turbo300

406 posts

272 months

Monday 22nd October 2007
quotequote all
In the good old days when the factory participated on the forum, Simon confirmed that 95 Ron was fine and that it was <1% difference in performance between the two.

You could phone the factory and ask, but you might as well ask your cat instead. (Not a good experience today when calling, can't believe these people used to be one of the most customer focused I knew.)

Rob.

Shegs1

90 posts

238 months

Monday 22nd October 2007
quotequote all
mr2turbo300 said:
In the good old days when the factory participated on the forum, Simon confirmed that 95 Ron was fine and that it was <1% difference in performance between the two.

You could phone the factory and ask, but you might as well ask your cat instead. (Not a good experience today when calling, can't believe these people used to be one of the most customer focused I knew.)

Rob.
Just asked the cat and he told me to p-ss off but the the Gerbil was more than helpful and he agrees with you!!!!!!!!!!!!! chuckle chuckle

Adrian W

15,493 posts

257 months

Monday 22nd October 2007
quotequote all
I don't think it makes any difference on the road when the air temp is fairly cool or cold, but in the summer id put the good stuff in just to stop detonation, the ECU just measures the intake temp and pulls out spark if it climbs, bit agricultural but that's it.

D_G

1,939 posts

238 months

Monday 22nd October 2007
quotequote all
I've always ran mine on optimax just to be on the safe side (alot cheaper than new pistons!)

Dave
smile

ajg31

1,455 posts

236 months

Monday 22nd October 2007
quotequote all
AMG Merc said:
ajg31 said:
95 will probably make the car start pinking when used hard. i have used 95 as a get me out of shit before but always taken in steady. I dont suppose the car is clever enough to have two maps to lower/alter itself for the lesser fuel?
The "car" is quite clever actually. If you ever get the chance speak with Trevor at Rousch. She won't pink with 95 RON. Mr. L. Noble told me personally during the old days when he was permitted to be chat directly with the Nobility.
smile Seems the car is alot more clever than this particular owner smile