oil pressure slow to rise

[8466]

My C90 comes up in 10 or so seconds, usually sits at 30 during idle, goes up to 55-60 during takeoff when the engine is still 150F or so. Comes down to 45 when the engine temp is 180F-200F. I also use a oil heater but it still takes a few minutes to go from oil at 100F to normal operating temperature.

What oil are you using?

20W-50

[8466]

I had the same issue. Luckily for me, it was a bad gauge.

I think it's the line to the gauge

[8466]

The pressure line from the engine to the gauge could be filled with gummy oil. I have disconnected it from the gauge and ran the engine for a few minutes until clear oil runs into a cup.

thanks, my amt agrees. Next week he's going to clean the line but if it's gummed up the gauge then will need a new gauge.