Bish bosh, sir. Upon what evidence, scientific, mechanical, anecdotal or experience, do you base this answer? In a 58 Imp, it is my experienced contention, that 100 octane is only best if you enjoy wasting money. Hugh ----- Original Message ----- From: <Antiquefox@xxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Monday, February 25, 2002 6:12 AM Subject: Re: IML: what gas do you use > Dear Hoppy, > > 100 octane leaded would be best. If your gasoline is unleaded like ours you > will have to search for an additive to compensate. If you don't you will > probably end up with a burnt valve. No Worries Mate. > > Bob Becker > 76 NYB, 81 IMP on the trail of a healthy 82IMP >