14 replies to this topic

[ianbunyan]

The bloke I am getting my Mini tuned with asked, "what fuel are you using?" i replied, "unleaded." and he said, "the good stuff?" I said, "you mean optimax? no, but i can... would you recommend it then?" to which HE said, "yeah, and i can tune your Mini up for it instead of regular fuel."

I know what optimax is and claims to do etc. but will it really make a difference on my 1974 Stage 1'd Mini?

Is it worth it do you think? I'm off in an hour! :grin:

[Purple Tom]

yes, providing you make sure you always use Optimax or a similar octane rating petrol in the future. If you revert to the lower octane (95RON or lower in some cases) fuel then your Mini will not run as well, as the timing/fuelling etc will have been set to perform better using the higher octane fuel.

[ianbunyan]

Excellent, thanks :grin: There isn't really a SHELL garage near me, but there is an Esso a 1.4 mile up the road that does it higher octane fuel so I shall be using that from now on... but hey, that'll be over £1 per litre now! Never mind... she's worth it! :grin:

[Guess-Works.com]

you could also use an after market octane booster...

[ianbunyan]

More details please... ?

[Wiggy]

Squirt some in the tank when you fill up with regular unleaded. That's it really.


BP Ultimate is also the 'good stuff'. I paid 105.9p for it the other day. :nugget:

[Dog]

Esso super unleaded is 97RON... I know as I work in a Esseo station...

So when rolling road tuning.. whats the best fuel/company to have?

[Wiggy]

Optimax is 98 RON. Supermarket Super UL is turd.

[Oldskoolbaby]

I found it worked wonders when I upped the CR of my last engine and altered the timing accordingly. Occasionaly Id have to fill up on normal fuel and I could really feel a difference. However if its just a simple stage 1 tune then you may only gain a couple of bhp over normal fuel.

[ianbunyan]

Aaah a couple of bhp will do me fine :cheese: Plus all the rest Bill Richards Racing managed to get out of her for me... she feels so much better now :grin: So Optimax is the best huh? What RON is Esso's top whack then?

[Dog]

Esso is 97 RON

as is

Texeco
Sainsburys
Morrisons
Tesco

[minidaves]

i believe tesco is doing a 99ron fuel now ) but i would stick with optimax because its gtee'd to be 98ron and normally around 99/100

dave

[Dog]

What does the RON stand for?

[Wiggy]

http://en.wikipedia....i/Octane_rating

Have a read of that.

[ianbunyan]

I love such detailed replies... thanks all!!