Hot Rod Magazine ran an article on this subject either earlier this year or late last year. I'll have to go through the collection to find it. One of the sources they listed for oils high in the desired additives is race oil. They listed a Quaker State race oil, but I didn't find any race oils listed on their website just now. I'll have to research this a little further. I've used Mobil 1 for years in many late model vehicles, and in some older ones with fresh motors (after a break-in with conventional oil). Never introduced it to a higher mileage vintage motor, but did find that the synthetics do not smoke like conventional oils when burned in the combustion chamber. A friend with a Chevelle showed me that trick. It would still smoke, but not the clouds that the conventional oil did. Rob McCall '67 LeBaron (probably will get Rotella when it's closer to roadworthy) ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm