Synthetic Oil versus Regular
My new to me toad is a 2008 Nissan Versa with 115,000 miles. I recently changed oil for the first time and learned that the high mileage oil I put in was synthetic and not regular as had been used by...
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Synthetic oil viscosity increases with heat and fossil oil viscosity decreases with heat. I was a crew chief for a race truck team. New engine with 50W racing oil in a 17 qt dry sump system and low oil pressure lite came on at lap 1.5. Panic city with $25K motor. Mobil 1 team in pits next to us gave us 2 cases of Mobil 1. Changed oil and the 2 filters and never saw the warning lite again that day. BTW we finished last and didn't qualify for the main. I run Mobil 1 turbodiesel oil in my cummins, Mobil 1 10W30 in my craftsman riding mower and Mobil 1 15W50 in my 468 cu inch jet boat.
