Hello Dan That is a very good question. And the answer to that would be that whoever wrote the Owner's Handbook must have made a mistake or just forgot to mention that in YOUR book. I say "your" book because mine clearly states that in the USA 87 should be used and that 91 was for Europe. Maybe I have a later version of the book that was updated. Anyway, in the Owner's Book that I have there is a mention of that on page 40. Right on top, on the right side of the page. Here's an EXACT copy of that: Fuel Requirements USA Your De Lorean is designed to operate at factory specifications at UNLEADED GASOLINE only of at least 87 anti-knock index (R+M/2) (91 research octane number) Is this a bulletproof enough source? :) Of course you might say that "at least" means that it can operate on 93. And you will be right. It CANNOT use anything less that 87 because it will cause damage. Anything more that 87 CAN be used. 93 CAN be used without causing immediate damage to the engine but it is a great waste of money and if the engine is designed to operate on 87 then 93 is not as good for it. The higher the octane number the less chance for detonation but at the same time combustion temperatures are higher. Use 87! Your car will be much better with it in the long run. And the most important thing - 93 IS NOT BETTER than 87. It is just DIFFERENT! The names "premium" or "super" are just clever marketing by the oil companies to make the customers feel that they are getting something better that is worth the higher price. In reality they are just the same but meant for different engines. The car I have here in Europe runs on 95 (RON) about 91 (R+M/2). It was designed for that gas. DeLorean was designed for 91 (RON) which is 87 (R+M/2) I hope this clears things up for you a bit. And don't forget to check page 40 in the Manual. Tom Niemczewski vin 6149 (in Poland!) tomciodmc@xxxxxxxxxxxxxx www.deloreana.com ----- Original Message ----- From: "Dan" <djdanwilson@xxxxxxxxx> To: <dmcnews@xxxxxxxxxxxxxxx> Sent: Saturday, December 17, 2005 10:20 AM Subject: [DML] Re: Failed emmissions AGAIN > --- In dmcnews@xxxxxxxxxxxxxxx, "Tom Niemczewski" <tomciodmc@xxxx> wrote: >> >> One of the reasons for your failed emissions might be the prolonged > use of >> premium fuel. > > Tom, here's another good question for you, or for anyone else that can > address it: > > The DeLorean was manufactured to be sold in the United States with the > exception of the 100 or so cars in the 17000 VIN series which were for > Canada, right? The car was not technically for sale in Europe. That > being the case then why would American cars intended and destined for > sale in the U.S. market come with Owner's Handbooks that reference the > European 91 octane rather than the U.S. 91 octane? > > If the 91 octane referenced in the DeLorean Owner's Handbook was the > European 91, and not the U.S. 91, To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/