Ha funny this question comes up, Yesterday at work I had a conversation with a regular customer of ours who has a 95 f-150 5.0L with 1 million,300K miles. He has only used Quaker State only for the life of the truck. Its the original motor and trans he just does 90% highway driving in his truck and changes oil and filter every month, and trans filter and fluid every 3 months. His maintenance schedule is a bit obsessive in my opinion but its obviously worked for him. So anyways I think Quaker State is ok for a F-150 lol , maybe you should switch F-150 forums.