I just picked up 05 MCS with prosport oil pressure gauge installed. Once the car warms up and out driving (~20min) at idle the gauge shows 9-10psi and sounds low pressure warning - annoying! I changed oil (royal purple, 5w30) and filter. Checked oil level last few days and its reading the same level and within acceptable ranges -- so assume no lost oil at this point. When driving pressure sits around 30-40psi @ 3k rpms (higher at cold start up temps - which I except). Anyone have similar experiences? Bad sender? trouble shooting? Thanks!