Oil Pressure
WARNING: This page is about a different car, the 2000 Lexus SC 300, 2000 Lexus GS 300, 1999 Lexus SC 300, and 1999 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
With engine at normal operating temperature, oil pressure should be at least 7.0 psi (0.5 kg/cm2 ) at idle, and about 47 psi (3.3 kg/cm2 ) at 3000 RPM.