Departments that run the 3.0 TT Interceptors put 6.5 quarts in their vehicles. My 2020 3.0 TT had a fill with 6.5 quarts written on the tower brace. My old 2012 Taurus squad as well as my 17 Explorer PIU the garage would add 1/2 quart extra and they lasted well over 100K miles and 9-15 thousand idle hours without any issues.