Keith, My man. You are a trip, you know that? You ain't even got the car yet and you are already crazier than me! So, anyway, here's a tip for you. Go to the 1958 page on the main site. You will find all kinds of good material. Specifically, go to http://www.imperialclub.com/YearbyYear/1958/Popular/page5.JPG This is the Engineer's report from an 1958 edition of Popular Mechanics. It goes into some detail as to the best gas to use in the 1958. I use regular unleaded 89 Octane in mine. If you read the article you will find out they specifically advise such gas, stating conclusively that you will derive no benefit at all from using a higher octane, even if you do advance the timing. I have certainly found this to be the case. In addition, I once tried to set the timing on the car "by the book" and it was a disaster. I know that others, whose opinion I respect very highly, have found the same result. The technical reason was explained here within the last year, but I only remember feeling my real world experience had simply been validated. I tune mine by ear. The car is set up for my own driving preference. Not being American, I am not really interested in off the line acceleration or 0 - 60 times, which seems to be the sine qua non for car performance in these parts. I am a lot more interested in mid and upper range response. I wants power response above fifty, for overtaking, for example. I get acceptable MPG and power where I want it. Can't beat that with a stick. Hugh 58 Imperial. ----- Original Message ----- From: "Keith Hopping" <oldhop@xxxxxxxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Sunday, February 24, 2002 8:40 PM Subject: IML: what gas do you use Hi team what octane gas do you yanks use in these old tarts ,my 58 arrives in about 3 weeks and the best gas we have 96 octane .I just bet one of you can tell me all about pros and cons of standard fuels over home blends etc.Feel free to educate a Kiwi petrol head Regards Hoppy