This oil really has made a big difference in how the car runs over the conventional oil. Got a 5 quart jug at Walmart for like $26.00 I seriously reccomend this product! Oh and BTW I am using the Mobil 1 filter as well. I drive a lot of short trips so want good engine protection. I will go the same route as my dad and change the filter at 5000 miles then change the oil at 10,000. I still make occasional 15 mile trips to our nearest town so I think I will be fine.