Posted by Kaegi [98.247.164.246] on Monday, January 27, 2014 at 12:35:02 :
In Reply to: What octane level do y'all run in your six? posted by Sterling [99.98.76.231] on Monday, January 27, 2014 at 08:39:20 :
the stock cam and compression ratio are designed for 70 octane. so 89 is like race fuel. Lead additives are not needed in flathead mopars because all flathead mopars from about 1933 till end of production came from the factory with hardened valve seats. That being said running the additives like Bardahl InsteadOlead may reduce carbon build up the same as running a higher octane fuel would also.
I run the insead O Lead in my slant 6 and poly powered trucks over the years because they do not have hardened seats.
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