does anyone know any tips to get a correct reading on oil pressure? i just replaced my oil pump and changed the oil of course. when the truck first starts the oild pressure reads about 25 to 30 psi. then as the truck warms up the pressure drops till the gauge reads 0. i dont think its the gauge since its a brand new autometer. what else is there to replace? the motor sounds fine even when the gauge is reading zero, no knocking or anything unusual also