When did they invent leaded gas in the US?

Here in Germany there was no lead in gas till 1957.
So all the pre 1960 engines can handle it without any problem grin

I drove 216s, 235s since years with unleaded and had any kind a problems :rolleyes: but never a valve problem. We even do quatermile with that, never heard about no-lead related problems from my Hotrod friends and we do a lot of abuse.

Frank