Which pressure. - More info gets a better answer.
Bad crank bearings . If the crank bearings are bad when the car warms up it will loose oil pressure. The reason being is there are holes in the crank where the bearings are and if the bearings have too much space between the the car will never build up enough pressure the oil will just run past the bearings and run back into the pan
As the tire warms up from friction so does the air inside it. As air gets warmer the air tries to expand thus increasing the pressure.
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yes
I had the same problem with my 99 f-150. Turned out to be a sick-sensor problem. Replacment of the oil pressure sensor was the fix.
Wait until it warms up and melts
Tune up
Todays car warms up faster if you drive it. Just drive easy
internal pressure increase
No, warn engine parts will cause loss of oil pressure as the engine warms up, due to expansion betweeen moving parts. Hot oil is thinner.
it needs replacing
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