Hi All....I was wondering, and I may be opening a can of worms here, no pun intended, regarding synthetic oil vs. regular (SAE type) oil in our Imperials. I have heard various comments/rumors about how, if you have used synthetic oil in a motor, you CANNOT go back to regular oil and visa versa as well. Then again, I heard that if you use any synth oil EXCEPT MOBIL 1, this was still the case but NOT with Mobil 1....is there REALLY a big difference, in an older or a rebuilt, or even a newer motor, if you use synth or just a good SAE oil ??( as long as you change whatever oil you are using every few thousand miles or so) ...and then, what about these 'additives' like Amsoil and such? anyone have any first had experience with any of these? If I am bringing up something that was discussed and beaten to death here some time ago I apologize for missing it and ask any comments to just be directed directly to me (dansgarage@xxxxxxxxxxxx) so as to not bore the rest of the IML list with info they have already heard before. Thanks all! Dan melnik ----------------- 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