Thank you Bob I, PJ and Tom in MO. I hadn't realized the octane gain was
only tenths. Oh well.

Tom, the car isn't driven more than a few hundred miles per year - about
to turn over to 60k when I put 'er away this week - so I guess valve
lubrication can starve for quite some decades before the wear becomes a
problem.

As I mentioned, I haven't had pinging problems using current day's
premium unleaded, so mixing in racing fuel wouldn't be worth the time,
effort or money.

Here's waving to ya - \||||

Owen
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'67BB & '72BB

-- not affiliated with JLA forum in any way -- alt.autos.corvette is
original posting --
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"To know the world intimately is the beginning of caring."
-- Ann Hayman Zwinger