My father is picking up an absolutely mint '93 Acura Legend with 90kmi on it. What oil should I put in here? I was thinking Schaeffer's 7000 (because I have a good bit) 10w30 or maybe a heavier weight oil since summer is coming up? This car is the cleanest car I've ever seen of this vintage with this many miles, and since it is one of my favorite cars (and it is so much nicer looking than any of the new acuras) I would like to make it last a long time.