Ya know me Johnny a total simpleton on engines but I have a question on octane in fuel and what is the best to run in my 408.
I know 91 is the lowest but do I have to reset my timing if I run any higher than say 93 octane? and is there any benefit running higher octane?
Also I don't use ethanol fuel but is there any advantage to using it?
91 or 93 is fine! No timing resets needed. Many areas of the country can't get 93. I don't think you will see any gains. It'll just be a little less prone to knock. No issues with 93 at all. For the $2 a fill up difference it probably is
