Chip Old wrote:
> It isn't just California. Leaded gasoline (er, petrol) hasn't been
> available in most of the US for many years, other than for aviation and
> auto racing applications.
>
> There are a number of additives available here that are supposed to
> protect valve seats, but I've never seen conclusive evidence that they
> work. The best defense is to install hardened seat inserts.
>
Now I've heard that people haven't really seen a difference, even with
hardened seats. Does anyone else have an opinion on this???
John
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