Posted by Mike V on September 11, 1997 at 07:52:00:
In Reply to: Re: Unleaded gas in a flat-head? posted by Joe Sacco on September 03, 1997 at 06:27:51:
: : : the lead was addedto gas to do 2 things, to cushion the valves and seats, and as a cheap way to raise the octane of the gas. Chrysler used very good valves and seats in these engines and as I have rebuilt quite a number of them I have yet to see any valve seat recession in any of them. I use unleaded in mine, and no one drives theirs harder then I do.
: : My M-37 runs fine on unleaded, I add alittle additive to help it out
: : however I got a load of that blended stuff (methonal?, ethonal? )
: : the 'ol girl went snap crackle pop and demanded the good stuff back.
: : a drain and refill and no further problems.
: Run some 2cycle oil in the gas once in while, or Marvel Mystery Oil. I don't know if this help, but I feel better. Any legal aditive will not contain lead, it is an octain booster. If you want to boost octain buy super it's cheaper than the additive.
Here is my two cents, My fire Dept has a '53 that we use as a first line truck for brush fires, we use regular unleaded in ours with no problems.
Mike