I have a 1.8 liter 2011 corolla automatic and have just over 100,000 miles on it. I've been using 0w-20 full synthetic oil but I feel like I need to switch to a high mileage oil to protect seals as they get older and what not.....my question is what weight and brand do you all recommend? if it help any I'm in southern Ontario and winters are mild mid 30's but summers are hot. thanks
Betzy
Betzy