Originally Posted by
Poeter
Don't think it would be a power issue but I guess you can disconnect your water temp gauge and see what happens.
What set of gauges are you using? I'm using a greddy informeter touch.
What is your exact idle temperature? Unless your water temp sensor has caused some impedence in the flow of your coolant. For our K20A, the oil is water-cooled at the oil filter section. From that, it can reduce the cooling efficiency of engine oil and therefore running at a higher temp. By running a higher temp, this can thin out your oil which leads to lower oil pressure.
Maybe some other factors to consider:
-How long have you been running this round of oil?
-Size of oil filter
-Ambient temperature
-Coolant level.
FYI, Honda service manual states 0.7 bar or 10psi minimum at 80 degree for inspection.