Jamie, Jamie, Jamie.....
Ok, look at it like this, you pay the price for 6 quarts of oil and (normal oil btw) and you change that oil every 3000, compared to only changing it once every 7K to 9K miles and know that the engine has a lubricant in it that is doing it's job.
Mobile 1 FS
My cost is $6.99 per quart. $41.94 and good for an easy 9,000 miles.
Mobile 5000
My cost is $2.99 per quart. $17.94 and good for 3000 or so and scary to me at WOT and runs hotter.
Motorcraft like you mentioned
My cost would be $3.49 per quart. $20.94 and good for 3000 or so and I would still be scared to push it with any WOT take off's.
Ok, now you change that oil every 3000 miles (3 times) or (2 times) compared to my one change and how much are you saving? It depends on what that part cost in the engine that got :q:q:q:qed up with that bull:q:q:q:q oil you put in.
I understand saving money on things, believe me but when it comes to my engine oil, I believe in saving the engine and myself the hassle, especially if you plan on keeping that car. Less engine wear, less friction, and the list goes on. You may as well go ahead and run Type F in your transmission too to save a few dollars. Mercon V is just a waste at $5 to $6 per quart. Do you really believe Mercon V makes a difference in the trans?
Can someone convince this hard head.