99RON Fuel at Tesco's ?

[Nick]

Found this link on the GTR board:

 

http://bbs.scoobynet.co.uk/showthread.php?t=423066

 

Badged as "99 Octane" but does that mean it's 99RON ?

[mikeyb10supra]

whats the difference??? is it not the same octane content though??

[Guest Terry S]

All our pump fuel is badged up in RON??

[SkyJawa]

Shell are also going to launch VPower over here, 99 octane though, on the continent its 100......

[Guest Terry S]

There is MON & RON.

 

MON = Motor Octane Number

RON = Research " "

 

The MON is a lower number than the RON. We have ours displayed in RON whilst the Americans is MON. All very confusing

[mikeyb10supra]

Terry is this worth a try then in my J-spec?? is the badge correct.....will this be better than optimax??

[Alex]

Gunna get my arse to my local Tesco after lunch and have a look see - but the tank is full atm so I won't be buying and testing!

[penguin]

same here..... but my tanks near enough running on reserves........ hmm... think it will take a few tanks to "flush" out the optimax before a good comparison can be made.... yes/no???

[Guest Terry S]

There is more in fuel than just the MON or RON. It wont be significantly better than Optimax, if at all. There are additives that are put into turbo specific fuels which prevent detonation. These may or may not be present in these fuels. Octane rating is normally a good guide line but try it and see, and just dont go crazy.

[SkyJawa]

same here..... but my tanks near enough running on reserves........ hmm... think it will take a few tanks to "flush" out the optimax before a good comparison can be made.... yes/no???

 

Nah, though it might take a while for your ECU to relearn unless you reset it......

[colsoop]

hopefully it will start a petrol price war

[penguin]

lol, dont count on it colsoop.... we've gotten to this point due to an "oil war".....

[colsoop]

It was wishful thinking wasn't it

[Alex]

Well my Tesco denied all knowledge...so it's not likely to be on the "shopping" list anytime soon.

[merckx]

One of the guys on http://bbs.scoobynet.co.uk posted this:

 

"Just called my local tesco in scotland .they called back to say..... Tesco are selling 99octane fuel in the south east of england on a trial basis to gauge customers reactions, they are loosing the lrp pumps which they will replace with 99 octane if reactions are good!!!!

so get buying it !"

 

 

I didn't know that Shell will be replacing Optimax with V-POWER 99 octane!

[tbourner]

Cool. isn't Japan on 100 RON?

 

Just gotta get rid of the potholes on our roads and we'll be sorted!!

[JohnA]

...The MON is a lower number than the RON. We have ours displayed in RON whilst the Americans is MON. All very confusing

Actually the americans display (RON+MON)/2, not MON.

Also their fuels are more oxygenated.

I've learned this the hard way, as I was using their maps for the Blackbird, and it started pinging like mad. ooops.

 

For turbocharged cars it's MON that's more relevant.

[b_have]

Actually the americans display (RON+MON)/2, not MON.

Also their fuels are more oxygenated.

I've learned this the hard way, as I was using their maps for the Blackbird, and it started pinging like mad. ooops.

 

For turbocharged cars it's MON that's more relevant.

 

Also known as AKI (anti knock index)

[SkyJawa]

Well Sandhurst Tesco's sells it, just down the road from me, so I'll try it next time!

[JohnA]

Also known as AKI (anti knock index)

yes

I have more on the subject in the 'fuelling' pages of my website if anyone feels thirsty for more

I've even managed to extract MON values from both shell and bp regarding their 'pride&joy' fuels.

(It's easier to extract teeth from live crocodiles)

[Chase]

John - Good info there, but I think this may be an interesting quote to some members on here who have been round for a few years...

 

Secondly adding certain OBs in Optimax might end up in 'rusty' sort of deposits all over the engine. Here is an extract from a post by Dr Iain Wiltshire (aka Mycroft). He usually knows what he's talking about.