It was time to change the oil - 5,000 miles. Was doing OK, until I attempted to remove the oil filter the Honda dealership put on - a gorilla must have done it. Just going to have to wait another 3-4K and get an oil wrench the next time. By then it will have 10-12K on that filter. I use Mobil One 0-20W. To not change the oil filter is sort of like showering and not having a complete change of clothes.