My 1996 Dodge work van B3500 5.2L V8 consumes about a quart every 1000 miles. It has approximately 255,xxx miles on it. The engine requires 10w30 and I have been putting Mobil1 10w30 extended performance and change it out twice a year. I just have to add a quart sometimes. Since I am out of my extended performance stash, I put Castrol Syntec 0w30. The oil consumption is about the same. Could anything help to prevent the oil consumption?