I have a 99 gt and no owners manual; how many quarts does it hold? I've called 5 different places, including FORD, and I have heard anywhere from 5 to 7 quarts. A local oil change place (American Lube Fast) said 6, and 7 if it had the towing package----- what the hell!!! A towing pakage on a mustang???? Please, someone with a owners manual give me a sane answer.