Nathan, Here is the fuel requirement rating for your engine as quoted from the Volvo owners manual. "Volvo engines require unleaded gasoline with an (R+M)/2 octane (also called the Anti-Knock Index, or AKI) of 87 or higher. This is generally equivalent to a Research Octane Number (RON) of 91 or higher." In simple terms the answer is 87 octane. DMC Joe -----Original Message----- From: Nathan Robinson [mailto:nathanrobinson@xxxxxxxxx] Sent: Wednesday, January 19, 2005 6:38 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: Re: [DML] Re: Delorean Fuel I kinda hate to bring up the whole Volvo/DMC PRV-6 thing agian... but I have a question about the fuel used in said engine, as there are some very knowledgable people on this list. As I have said earlier, I have a 1980 Volvo 264 GLE (close enough of the same PRV-6 engine.) Now. My manufacturers book states to use 91 octane, however it doesn't specify as to which continent. Would I presume this to be the European octane rating? There is a significant difference in price, so I'm somewhat interested if it would be considered safe to run 87 Oct. in the PRV-6 engine. To my knowledge, I do not have a knock sensor in the engine, so I am a little weary , and have always run 91+ Oct. in my car, consequently making fillups very expensive. What say ye? ~Nathan 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/