* At idle: 10-15 psi
* At cruising speed: 40-60 psi
Your oil pressure readings are within the normal range for a sbc 350, so there is no cause for concern.
Note that oil pressure can vary depending on several factors, including:
1. Engine speed: Oil pressure typically increases with engine speed
2. Engine operating temperature: Oil pressure tends to decrease slightly, as the engine reaches its normal operating temperature
3. Oil viscosity: Thicker oil will produce higher oil pressure than thinner oil
4. Oil pump condition: A worn-out oil pump can cause low oil pressure
5. Engine bearing clearances: Excessive bearing clearances can lead to low oil pressure
