I have a 1994 Dodge Grand Caravan with the 3.3L V6 engine in it. The van has 167k miles on it right now, and it is beginning to burn around a quart and a half every 3000mi change period. 5w-30 is recommended in the owner's manual. Recently I've used Quaker State Higher Mileage 10w-30, Valvoline Maxlife 10w-30 and Valvoline conventional 5w-30. I'm not interested in an expensive oil for this vehicle, but I am curious for a recommendation of a good basic $1-2 a quart oil. Are the higher mileage oils usually worth it?