Did a quick search but i cold find anything specific. I had free oil changes on my car for two years after i bought it which have just finally expired. Back to doing my own changes which i actually prefer and have done on all my cars before this one. I went to pick up some oil today at wally world and notcied that mobil 1 full syn comes in quite a few flavors now. I was looking to Get 5w-30 but the only one they had was high milage.... So i bought that. Any difference? My thinking is that it is probably just more resistant to breakdown than a standard oil.