What MON is equivalent to 98RON ?

[turbodave]

Or is it waaaaaaay more complicated than that?

Basically, I've just left the UK and am now living in the Good 'ol USA (Tony and his cronies have succeded in making me want to leave - hopefully it was a personal vendetta against me and fuel costs will now fall, public transport will improve overnight, and all sppeding cameras will be converted into short lamp-posts....) sorry, I digress.

I've got my mini coming over sometime soon, which was turbocharged and in a pretty high state of tune. I always used Optimax, ultimate, or whatever the 98RON pump was calling itself... Now i'm over here, and everyone says how the fuel is rubbish compared the UK... Surely the 'premium' stuff must be as near as dammit to the 98RON uk stuff, or is it so much more than just calorific value???

I'm no scientist, so you can write 10 paragraphs on the differences to show off your knowledge, but I'd much rather the differences (if there are any) be explained in bite-sized chunks...

Basically, will my mini like the US fuel, or not? Will a simple octane booster like RED-LINE octane booster do the trick if not? etc etc etc...

[Guy Humpage]

The American rating isn't a MON one, it is the average of the MON and RON ratings....

Looking at www.76andr.co.uk and clicking on their list of race fuels, there doesn't seem to be a direct link in the RON and MON numbers...

The pump 'premium' (91) in the States is not disimilar to our 'premium' (95-RON).

According to this link : www.btinternet.com/~madmole/Reference/RONMONPON.html : the pump rating is known as 'PON'

[lazy_b]

More than you ever wanted to know about octane ratings:-
www.repairfaq.org/filipg/AUTO/F_Gasoline6.html

[stevieturbo]

The US's 93MON is supposed to be about the same as our SUL 97RON, but I think thats being rather hopeful.

Our fuel is pretty crap by their standards, so Id say a more reasonable guess would be that their 93MON is about same as our 95RON

[steve_D]

From what i've seen on the chevytalk forum there are a host of outlets where you can get octanes over 100. Almost 'at the pump' but not quite.

Steve

[GavinPearson]

If you buy 91 or above you should be OK.

Personally I buy 93 R+M/2 Citgo, works a treat.

[stevieturbo]

For a comparison, and Im not sure if he reads this specific forum. But a friends car has recently returned from the U.S. after having some work done. It ran fine over there and made some serious power.

Now that it has returned to the UK, it is detonating on the best pump fuel the UK has to offer.

Dave, you will have no worries at all with US fuel, besides, you can buy leaded or unleaded race fuel with octane ratings around 115-120RON over there for the same price as our pump fuel here.

[love machine]

Dave, enjoy the cheap fuel. Lucky bastard.

Stu