Drain oil first, then remove the bolts that hold it up you will need a 10MM and mm Socket with extentions...
it may be the oil pressure sender located on the engine
It is normal for the oil pressure to drop when the engine is warmed up and at an idle.
Dextron/Mercon.
Read what it says on the OIL filler cap....
Remove engine oil pan
oil is thinner when its hot, that's why.
Underneath the engine block.
oil leaks
Underside, near oil pan.
oil is thinner when its hot, that's why.
It requires a special socket to fit it.
5w30 unless you leak massive amounts of oil, then I would put 10w30.