The 140 engine has been rebuilt and has a new oil pump. I have a VDO electric OP gauge on it and have been thinking about some of the reading I've been seeing. When the engine and oil (10w40) are cold the gauge reads around 50psi. Once the engine and oil gets warm, the reading is less than 20 psi at idle (650 RPM) and just under 40 at higher RPM. Is that normal? Thanks for the input, Ned