Conventional oil should be changed if the temp gets over 270 degrees. Most oil temps are about 20 or so above water temps. At a NASCAR race there was a car that finished the race when was a problem with an oil cooler. The oil got so hot the driver sustained burns on his back (where the oil tank sits). The synthetic oil got so hot it didn't register on the temp gauge.
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1979 Trans Am WS-6 .030 455 zero decked
flat pistons
96 heads with SS valves
041 cam with Rhoads lifters 1.65 rockers
RPM rods
800 Cliffs Q Jet on Holley Street Dominator
ST-10 4 speed (3.42 first)
w 2.73 rear gear
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469th TFS Korat Thailand 1968-69 F-4E Muzzle 2
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