Quote:
Originally Posted by wdfifteen
Not all American classics were built so cheaply. Chrysler flatheads had steel seats clear back to the early 30s.
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Thanks.
This really puts the OP linked videos mech. advice and statements into question.
So Chrysler flat head engines did not have problem with unleaded gas going back to the 30's. So right there the line "Classic cars need lead" is wrong from a Chrysler point of view, maybe some did but not the flat heads going back to the 30's.
Also unleaded gas does not glue valves in guides, old gas does. And there is nothing you can do to classic car engine (or new car engine) to prevent that. Just do not run old gas.
Generally speaking, unleaded gas was a problem with American car engines and some British cars if they were made with out hardened valve seats. But classic cars made by Porsche, Maserati, Lamborghini, Ferrari, Fiat, Jaguar, Aston Martin, VW, Datsun, Mazda, Subaru, Toyota, Mercedes to name a few did not need lead in the gas for valves.