Since my dad is moving closer to me (10 minutes away) I'm going to take over doing what maintenance I can to his car. So, what's a recommendation for a car this old? Owners manual specs either a 10w/30 or 5w/30 for colder climates. Car currently has about 156,000 miles on it and so far doesn't burn any oil. He's kept it well maintained since he bought it but I have no idea what the previous shops used oil wise.