Hello again <SNIP> >> Cruising at constant >> highway speed does not put a lot of load on the engine and at the > same time >> keeps it running at high RPMs. Great exercise for the engine, clears > any >> deposits, moves a lot of gas through the converter clearing it as well. > How about moving down to 89 first, then 87? **** Yes, you can do that. But 89 burns slower than 87. It will definitely be better than 93 (or 91) and will help in the process of clearing any deposits left by the use of 93 (91). If your engine isn't really bad (a lot of deposits and knock) then by switching right away to 87 you will speed up the process. If you get serious knock from 87 then using 89 for a while is a good idea. One or two full tanks of 89 and then switch to 87 and stay with 87. And taking the car on a highway is a good idea for every car that only sees city driving. Any DeLorean that is only used to go to drive-ins or a lot of city driving will be very happy with occasional hour long drive on the highway using 87 gas. Just like running is good for your heart, highway is good for the engine :) >> I would like to congratulate everyone who got this far reading my tech >> stuff. You must be really TOUGH! ;) > Tom - Just so you know, I was not trying to debate you or say you were > wrong. I'm just trying to understand. **** It's ok Dan, I know that. I did not take it as that. Like I said before, there is a lot of confusion when it comes to gasoline grades and I am glad I can share my knowledge with others... and help some DeLoreans in the process :) If you have any other questions concerning this subject don't hesitate to ask. I'd be glad to help you out. I've spent some time working at an automotive lab doing research on things like gasoline use, emissions, engine oil etc. I'm glad I can share what I have learned there. Take care Greetings from snowy Poland! Tom Niemczewski vin 6149 (in Poland!) tomciodmc@xxxxxxxxxxxxxx www.deloreana.com 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/