Hey guys need some insight on an oil pressure question. I have a 2003 Nissan 350Z. After completing the engine breakin with DINO oil (using Bosch oil filters) I switch to Mobil 1 5W-30 as per the owners manual recommended weight.
Still using the Bosch oil filter, I have noticed that my oil pressure (with M1) is about 15psi higher at cruising speeds and about 30psi higher at redline then it was with DINO oil.
According to my service manual the oil pressure is measured between the oil pump and oil filter.
The oil filter is getting nice and hot so it seems to be getting oil flow, but I have not tried replacing it yet. My questions are:
1. What would cause this large pressure increase?
2. Does increased oil pressure in this case mean more or less oil flow volume? Or is the flow volume the same but the oil filter may go into bypass mode sometimes?
Thanks in advance