I think that the guy with the engine problem after changing to 10-40 has some other issues with his engine. If the engine is fairly clean to begin with he would not have had problems. If the engine had non detergent then was changed to detergent then that would be the problem, as non detergent oils will cause sluge. ----------------- 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