My instrument panel seems to be going a bit haywire. The Oil Pressure gauge seems to jump all the way to 5 and stick there even when idling, but the Oil warning light comes on and flickers as I increase the RPMs and so does the central warning light. The Brake Fluid level light came on when the Oil Pressure lit cam on, but went out when I checked the Brake Fluid. It was full. Strangely before this the brake fluid had become extremely low and the light never came on.

I was interested in installing an aftermarket oil pressure gauge to keep an accurate indication of pressure.

Any recommendations on what brand gauge I should use and how it should be installed? Wiring etc.?