Chuck, Mine does the same thing! Never have figured out why. The plugs, wires and cap are a few years old, but never seem bad to me. I had my car at Grady's in March and Pat checked the fuel pressures, mixture, etc. and still I have have pinging on low octane gas. It's not terrible, but noticable under load when the engine is warm. It's strange, because except for mild pinging on cheap gas, this engine runs like a Swiss watch. Anybody have any ideas how to get my car back to cheap gas? Jake Kamphoefner 1063 beatlesra1@xxxxxxx wrote: Unbelievable but true..My car will only run on 93 or 94- octane. If I put 91 in it's knocks like crazy. I've told this to a few of me fellow Delorean owners and they think I'm crazy! Chuck Vin 6125 DCO 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/