Day 2 - Half tank remaining.

4.2 V8 32v Naturally Aspirated - 414 bhp
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Winterrunner
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Post by Winterrunner » Tue Mar 24, 2009 4:27 pm

Nige_RS4 wrote:
Winterrunner wrote:
Nige_RS4 wrote:You should really use 98 octane minimum for this engine - you will be down on power by approx 20-30bhp! Cheapskate dealers!
Us americans only regularly see 93 as our top tier gas..... (5+ is very hard to find. I would like to try some 105oct. one of these days, see how she goes on that.
The RON rating is the US is different to that in the UK. I think your 93 is the same as our 97.
Do you know of a conversion calculator online? Thanks.
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SR71
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Post by SR71 » Tue Mar 24, 2009 5:03 pm

US = (RON+MON)/2

We just use RON.
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PetrolDave
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Post by PetrolDave » Tue Mar 24, 2009 6:12 pm

The US doesn't use RON ratings they use the average of MON and RON.

Since the MON value is usually about 10 points below the RON value US "93 octane" is equivalent to UK "98 octane" fuel.
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Winterrunner
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Post by Winterrunner » Tue Mar 24, 2009 6:24 pm

ok thanks guys!
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