Oil pressure reading at hot idle?

[ThakurA]

07 jdm legacy gt, Ej207 shortblock swap with stock heads and new OEM 12mm oil pump.

What is the correct oil pressure reading at hot idle?

My hot idle reads 14-15psi after some spirited driving which seems low.
Cold start - 91-94psi,
warm idle- 30psi.

Is this acceptable range for hot idle or it needs shimming of oil pump to raise the oil pressure at idle.?

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[Thabias]

I’d want to know what the oil temps and oil type are.

Oil Viscosity and Temperature: High oil temperatures from spirited driving can thin the oil, reducing pressure. If you’re using a lighter oil (e.g., 5W-30), consider switching to a higher viscosity oil like 5W-40 or 10W-40 to maintain better pressure at high temperatures.

(I happen to use Rotella T6, 5w-40 in my 03 wrx)

[Charlie-III]

If it was my car, I wouldn't worry about that pressure if I was running a light oil. If running a 15W-40, I would worry, 10W-30 or lower would give those numbers.

[ThakurA]

Originally Posted by Thabias

I’d want to know what the oil temps and oil type are.

Oil Viscosity and Temperature: High oil temperatures from spirited driving can thin the oil, reducing pressure. If you’re using a lighter oil (e.g., 5W-30), consider switching to a higher viscosity oil like 5W-40 or 10W-40 to maintain better pressure at high temperatures.

(I happen to use Rotella T6, 5w-40 in my 03 wrx)

Im still under break-in mileage(450 miles) approx. Im running Castrol 15w40 mineral oil for now. Will switch to synthetic once 1500miles are done.