Oil Pressure
WARNING: This page is about a different car, the 2001 Mazda Millenia and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Inspect oil pressure at gallery above oil filter. With engine at normal operating temperature, oil pressure should be 48-71 psi (3.4-5.0 kg/cm2 ) at 3000 RPM.