How many quarts of oil need to be put in a dodge Durango?

Depends on what vehicle you are asking about which you did not list.

it is actually 7 quarts

book calls for 7 qts i find that i have to 8 in

6 with filter change

Engine, with WIX Filter 51085..........4.6 quarts [1] Engine, with WIX Filter 51085..........4.1 quarts [1] Engine, with WIX Filter 51085 ..........5 quarts [1] [1]. After refill check oil...