gasoline

[bigclipper13]

For a 1963 dodge slant six, do you have to add lead substitute for the gas?

[dodgeboykim]

Original engine does not have hardened seats so it would be a good idea.

[Kaegi]

I run Bardahl instead "O" lead. MOst auto parts stores can order it. most carry other Bardahl products but not usually the insteadolead

Made in Ballard WA since 1939

https://bardahl.com/products/special-du ... -lead-gold

[BigBlockTrucks]

An old timer once told me to put some atf in with the gas. Don’t know how well it works. It tAkes a while to wear out the valve seats.

[PwrWgnDrvr]

An old timer once told me to put some atf in with the gas. Don’t know how well it works. It tAkes a while to wear out the valve seats.

Not as long as you would think. Less than 8000 miles on a poly valve job that the shop used some insane soft seats. They eroded to a thin wire ring, then broke and fell out of the head. As they eroded, the valve sunk into the head, valve lash disappeared until they weren't closing and power declined. Re-adjusted about 10 times until total failure revealed wtf was happening.