Is the car have any leaking seals? I have a 94 Altima with 118,000 that I am doing an auto-rx treatment. There might be some benefit to a high mileage formula preferably Castrol or Pennzoil, not Valvoline. If the price for the latter two oils was less than $2.25 then I would consider buying them. They have esters that help old seals and gaskets. I would recommend the auto-rx plan first, though.