Date: Sat, 11 Oct 2003 19:54:55 GMT
From: Paul Halliday <>
Subject: Re: any one know what 93 Octane in the US is, in RON?

in article, MeatballTurbo at wrote on 11/10/03 6:16 pm: > We've just gotten BP/Amoco Ultimate here in the UK. > It is listed on the Amoco US site as 93 Octane. > On the BP Greece site, it is listed as 100 Octane, but doesn't say > whether that is MON/PON/RON rating. > > On the pumps, it doesn't state the Octane at all. If you want to know what RON BP Ultimate is, there's a thread on Saab Central. I gather it's 97.5 RON (from VW and Saxo forums, found by colleagues) but with the "additives", you get the equivalent of 100 RON. I gather the petrol is like adding one of those "octane booster" products to a normal tank of Super. I've yet to try the petrol, but my impression of other similar products, such as Shell Optimax, are that they're good for the odd tank here and there, but you're better with normal super unleaded at 97 RON. I measure petrol performance as a combination of MPG and number of embarrassed Bimmers, although I'm starting to pick more on Mercs now :) Actually, I find that Optimax produces a less controlled (wandering needle on my calibarated gauge) and sustained top boost compared to normal super unleaded on my car. I'll post my impression of BP Ultimate for the classic 900 when I've tried a couple of tanks. Paul 1989 900 Turbo S

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