Jumpy Oil pressure gague

My oil pressure gague seems very "jumpy"

Suppose when I ma stoppedat lights with the selector to N the gague will be dancing from 1.5 to 2.5 when warm.

The other times it may settle at 2 and stay put.

Any ideas on why I seem to get such an erratic reaging.

Is it engine an engine issue (runs fine), a sensor issue or a gague issue?


Thanks,

John

1981 500 SEL (converted to a 300 SDL)