Need to do at least 1 more drain/fill to see benefit from the Amsoil fluid. I am surprised tho you got 7 quarts out. Most people get 5-5.5. Capacity is 11.6 quarts. 1 more D/F will get you to 85% exchanged out. 2 more D/Fs will get you to 94%. So, try for at least 1 more D/F.