I'm going to be changing the oil for a friend. She drives a 95 T-Bird with the 4.6L SOHC engine. It has about 150k on the clock. I'm thinking of going to Wally's and geting Pennz 10W-30 High Mileage oil and a Motorcraft filter. Do you experts agree on this? The car does have some consumption issues. It doesn't visibly smoke and I see no leaks on the concrete where it's parked, but the oil is going somewhere. What say you? Thanks.