oil presure question need help/info

az1966

Well-known member
66 mustang 200 ci motor, 3spd manual tranny,aftermarket A/C, new 3 row radiator, fan shroud
12 inch after market cooling fan in front of the radiator

problem here in arizona is that it''s hot as all get out,,, ( 113 degrees today ) water temp gauge is "normal" thru out all driving situations/stop and go/freeway ...for this time of year,,, problem is the oil gauge starts out as "normal".. dead center and starts to drop as engine warms up /drive around town,,turn on A/C just about drops to the left 1st hash mark on the gauge,, goes back to close to normal when driving on the road,, just switched to 10-40 synthetic oil and it helped a little,,, no rod knocking going on engine sounds normal and run''s ok,,, but still concerned,,,,,, I understand that factory gauges are only a step up from idot lights ,,, but none the less I could use some serious input

thanks as usual
 
Need to hook up a mechanical guage.

Anything 45 psi hot or above is fine on a fresh engine. Bill
 
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