Re: Oil Synthetic or Not? Gas - What Octane? With or Without Ethanol?

Posted by Dave Kenney On 2009/3/4 19:24:02

Frank, I have used synthetic motor oils espcially Mobil 1 in my daily drivers and more modern collector cars for many years but for my 1947 Packard I use a 15/40 Diesel oil , usually Shell Rotella but any brand will do. I suppose that a 100% synthetic or blended would not hurt but probably a waste of money as I don't really see a benefit in the types of driving and speeds we typically use our Packards. Others with equally valid reasons may have a different opinion.
Eighty-seven octane is all the octane your engine can use and if you can get it without ethanol so much the better but if not don't worry about it. There have been other postings on the subject so if you do a search you will find other opinions on these much discussed topics.
for example;https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=2035&forum=1&post_id=19442#forumpost19442

And BTW if you haven't already done so please post a photo of your Packard in the Packard Owners Registry before a certain Aussie sends you a reminder!