Barrie Robinson wrote:
>As to the lead hysteria, I did a years long test for Shell using lead
>free petrol on a newly built engine. When examined at the end of the
>year there was absolutely no sign of trouble.
>
>
It really depends on the engine. When we switched to unleaded in
California, our Landcruiser started suffering from valve seat recession
within a few months. Sold it before we had to redo the cylinder head,
but when I had the B's engine rebuilt, I made sure they put in hardened
valve seats.
Cheers,
Dave Ambrose
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