>I started by running 10-30 oil (leaked too much and resulted in low
> oil pressure) I changed to 20 50, and get approx 50 psi on startup.
> Once engine is hot (15 minutes on the highway) oil pressure slowly
> drops off to approx 25 psi. I dont want to run the engine until this
> is resolved.
Jerome, First welcome to the listing.I have a sereis ll and have never except on starting had over 20-25 pds running warm. Standard 30# oil non-detergent oil of good quality .
> The engine has an non-original oil filter
> base for a modern oil filter (fram ph16 currently installed) and
> therefore the base is not the same as original
Mine is the same setup.
> Questions: Can anyone confirm this adapter base is acceptable? (it
> looks like a good fit and doesnt leak) Do I need a special pressure
> relief valve for this base or did it come with only one spring value?
> (stock valves are larger diameter and dont fit...also stock unit felt
> a little stiffer when I pressed on it with a screwdriver) ......If
> the pressure relief valve checks out OK, does anyone have any
> suggestion prior to pulling the oil pump?
For this is a more tech question I'll leave it to those who know.Chuck, portland,OR