Im new to the forum as i have recntly become the proud owner of a 95 gpx!! I love the car to bits but just got one problem i need some advice on. What oil should be used in the engine?? Cos when its cold its quiet no tappet noise but when it warms up there is tappet noise there. It doesnt lose any power or run any differently. Could i use a better oil to help sort this problem????