Hi It is true that the manual states to use 91 octane fuel. But you have to remember one thing - it was written in British english! They also tell you to check your TYRES ;). There is a different system used in Europe to determine the octane rating. Europe uses the research method, while US uses R+M/2 formula. To make things simple - 91 octane in Europe is exactly the same as 87 in US. Use 87 if you are in US and Canada. Use 91 if you are in Europe. I hope this clears up the confusion. Tom Niemczewski VIN 6298 (FOR SALE) tomciodmc@xxxx ----- Original Message ----- From: "mccarthy410" <mccarthy410@xxxx> > Hi, > > I am a new prospective owner of a DeLorean, before I buy, I'm > gathering all info I can. One question comes to mind, I know the > manual and several sites say to use 91 Octane fuel, only thing close > to it is 93, and that does get expensive. Can 87 or 89 Octane be > used with no ill effects? I'm told how the Europeans and how the U.S. > rates gasoline are two different things, any truth to this? > > Thanks.