Hot day here in NY (88f) with A/C on and driving in a spirited but sane manner, coolant temp goes high, but at least one line below max. Oil temp redlines. Wish I had an oil pressure gauge in this car (86 4KCSQ). How normal is this? Comes down significantly at idle or with a/c switched off. The oil is freshly changed Castrol 20/50. Mobil1 filter. Thanks for any comments or BTDT, Jeff