I recently obtained a 2002 Acura MDX touring with very close to 300,000 miles. I'm looking for the correct/best oil type, or all that would be okay to use, as well as wondering this.. my step father has a great high end oil just sitting in his garage, however it is not a high mileage oil. Can I use this conventional oil safely in my vehicle? I'm under the impression that there is a much needed additive in high mileage oils that is not in low mileage oils. Something about some type of caps that benefit from the high mileage oils... If I were to go ahead and use the oil, would there be something I can do to ensure the cleanliness of whatever caps these are, or would it be okay to just use the oil.