hello my wife's 1992 Acura gets driven only 2miles a day to her office and back. The rest of this car's trips are all short. We're in toronto so the winter's get pretty brutal too. The question is, since the oil in this car rarely gets hot(or even warm in winter, probably) wouldn't I be better off with a 0W20 oil that is as thin as possible for better protection. I've got Mobil1 5W30 in it now and I'm doing 2X/year changes. spring and fall. mileage at each OCI is usually less than 5000miles. thanks.