Yesterday I changed my fill of Mobil1 EP 5W30 and a Mobil1 EP filter to Pennzoil Platinum and a PureOne, on my 2002 Toyota Camry 4 cylinder. I made two observations:
1) When I was under the car checking for leaks after first firing it up, the filter did not get as hot as with Mobil1. The oil pressure light went out after 2 seconds of firing up the engine, so the pressure was good. The engine has no in block bypass so all the oil has to pass through the filter. Different thermal properties?
2) With Mobil1, SS or EP, after shutting down the engine in the garage, I can hear rather loud noise of oil dropping down to the pan; with PP, the drop noise is much softer, and I have to lean over to the front of the car to hear it.
Engine runs smooth like a stick of butter on PP, even it is on the thinner side. 200 miles of round trip today @ 70 MPH MAX, 55 MPH average (highway + city) yielded 33.8 MPG (EPA 24/33), according to my ScanGaugeII. No previous data from Mobil1.
1) When I was under the car checking for leaks after first firing it up, the filter did not get as hot as with Mobil1. The oil pressure light went out after 2 seconds of firing up the engine, so the pressure was good. The engine has no in block bypass so all the oil has to pass through the filter. Different thermal properties?

2) With Mobil1, SS or EP, after shutting down the engine in the garage, I can hear rather loud noise of oil dropping down to the pan; with PP, the drop noise is much softer, and I have to lean over to the front of the car to hear it.
Engine runs smooth like a stick of butter on PP, even it is on the thinner side. 200 miles of round trip today @ 70 MPH MAX, 55 MPH average (highway + city) yielded 33.8 MPG (EPA 24/33), according to my ScanGaugeII. No previous data from Mobil1.