John A. January 2, 2020. The 2007 Dodge Grand Caravan comes with three engines to select from. There two versions of the 3.3L V6 the non-Flex fuel compatible and the Flex fuel compatible version and both need 5 quarts of 5W20 synthetic oil. The 3.8L V6 engine uses 5 quarts of 5W20 synthetic oil also. likeAlternative.