Hi,
I have a 2000 Toyota Corolla VE model car driven with 155K miles. I live in Vancouver, BC, Canada. So you can imagine the car sits in the external temperature of -2 to 30 C (In Fahrenheit: 28 - 86). Since last 2 years I have been using the Mobil-1 Synthetic 5W-30 engine oil and at times use...