Went to Belle tire today for a new tire and while I was there had them change my oil. 21 Escape 150,000 miles every oil change so far has been ford dealer 5w20 blend at 5,000 miles. I drive all freeway daily for work. Today they put in Mobil special 5w30. Should I be worried and why would they make the next service sticker for 3,000 miles? Not sure if i should be worried about the brand or the weight? Any opinions? Thanks guys.