Re: Oil Pressure/temp. in '73 TR-6.

["Christopher A. Kent" <kent@parc.xerox.com>]

Do you know what sort of oil is in it? Sounds like it's something too
lightweight; it's thinning too much with heat. Try changing to Castrol
20W50 and see if the problem goes away (I used to see the same thing on
a load of 10W30).

Otherwise, it might be time for new bearing shells or oil pump, despite
what the previous owner said about a "complete rebuild".