1996 Chevy Cavalier Which oil is best for car with over 190

I use 10w40 high mileage oils in my older vehicles. As a motor gets older the bearing tolerances get bigger thicker oil aids in filling that gap per say. As far as the burning smell I would check for a possiable oil leak. Valve cover gaskets are common. And the oil usually burns off before hitting the ground so you dont see the leak on the ground.