i installed oil and water temp gauges and i found out a few things, the oil pressure starts out about 40 and as it get warmer it drops to about 20 as long as you are going 40 to 50 mph its about 20 to 25 psi, now thw crazy thing is when you turn to the left it drops to 0 but it comes back up in a few seconds ( 5 to 10 ) then back up to 25 turn the wheel to left again and drops why is that ,, the temp gauge reads about 170 until you stop at red light then it goes to 190 maybe more it does drop back to 170 or 180 after you start going again ,,, can some help with the oil dropping when turning to left

thanks guys


1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny