5w/30 fully synthetic oil.
Also these engines have a reputation for snapping a camshaft at anything over 30k miles. So I'd whip the cam cover off and make sure the bolts holding the camshafts down are fully tightened. It could save you a £1000 bill.
As for the seat belt, if it just needs the stalk that it fits into, obtain a cheap replacement off a scrappy.
ChicksFan
April 2010