I've read some on unleaded gas damaging valve seats on our older cars due to the lack of Tetraethyl Lead and it's lubrication qualities and that the only fix is to have hardened seats installed.

On the other hand I've read that there is minimal damage to valve seats and there is no need to do anything with the valve seats. Then I've read that there are other additives that can lubricate the valve seats sufficiently to prevent damage.

Talking to a guy that rebuilds old carburetors, he says that just running them richer with unleaded is sufficient to prevent damage to valve seats.

I'm a little confused but I know the truth is somewhere in all that. I really don't want to do anything to the heads on my car if I can at all avoid it. Currently I can get lead additive for it but I wouldn't mind not having to since it's an added expense.

I'm sure there is a right path to go down with a little guidance.