Premium gas = 93 Octane?

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May 10, 2014 | 11:26 PM

#21

jagent

Veteran Member

Joined: Nov 2011

Posts: 1,535

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From: Melbourne, Australia

If for some reason I couldn't get the correct fuel grade, I'd go one up but definitely not down.

May 11, 2014 | 04:03 PM

#22

cool

Senior Member

Joined: Oct 2008

Posts: 293

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Quote:

Originally Posted by abonano

Your Jaguar is rated for 91 octane or better - translation for best overall performance - 93 Octane - now I've heard of people switching between 89 octane and 93 octane when filling up to get that 91 octane "mix" - hope this helps...

sorry to disagree, with the method you mention, it is not right and will not give nor create an average octane rating.

May 11, 2014 | 11:01 PM

#23

jvitez

Senior Member

Joined: Oct 2012

Posts: 148

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From: Canada

We only have one station that sells 94 octane, and it's E10. Everything else is 91 AKI, which is 100% gasoline here, no ethanol. I'd rather not use ethanol in my 18 year old XJR, so 91 octane it is. I've got the "Andy bracket" BTW.