I have fiesta turbo and the oil pressure isn't very good when it's on idle and engine is hot it drops to about 11 psi but when driving it's about 30 40 psi and when started from cold about 50 60 psi the oil pump is 18 month old but the car is hardly driven so only done 3000 miles since then. It has mobile 1 15/50 oil in it anyone got an idea why the pressure aint to great? Thanks