so even after replacing the op sensor, you still got a low reading? and what you did was replace the electrick sensor with at "wet" one and the oil pressure seems to have been good all along?

im having same "low" pressure problem and dont want to throw money and parts with out fully understanding it first. my problem started right after a oil change, which im partially blaming on a small STP filter compared to the size filter was there prior to oil change.

if this doesnt work the op sensor seems to be the next thing to look at. can you please tell me what brand u used, and where to replace it???