uh lets see I just went over 250,000KM the other day so... about 150,000 miles. If you believe I'll benefit I will do it. In about Dec 03, I acquired my old mystique. So in about 20 months or so I've put on about 60,000 miles. Most of them highway obviously. So well here's what I'm going to do then, Higher mileage 5w20 with a high endurance oil filter, that sounds like a good economical investment. I'll get the durable oil that lasts as long as you say, about 5,000 miles.