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

Posted by Frank On 2009/3/4 18:51:31

I read in the 1954 Service manual that the recommended oil for the 327ci Straight 8 Thunderbolt is 20W SAE in most driving conditions but I was wondering if it would be better to use s synthetic mix so that you get the best of both oils? Also - what would be the best fuel? What octane? With or without ethanol? Thanks