previous experience with 4.6 modular motors 01,02 , and 03 had issues with the tensioners , they sound like a sewing machine . best bet is to pull the front covers off of the motor to inspect , more then likely you will find them worn through and if you do a lab on your oil you will find metal and plastic in your oil if the tensioners are worn
we had this issues in a lot of squad cars from that era in our villages fleet . being out east the 5W will help in winter starts , the 30 will provide very adequate lubrication at operating temps , still look at the timing chains and tensioners
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07 Ford Freestyle 121K
04 Hyundai Sonota 275K
02 Ford Tarus 75K
00 Buick RegalGS/SC 131K
94 Jeep Grand Cherokee Laredo 177K
95 Goldwing 28k
I previously posted this above
ford spec'd 5w30 for the 4.6 modular motors and then in o5?? back spec'd everything to 5w20 for CAFE fuel economy requirements , we always ran 5W30 in all the cars with an Motorcraft 820 filter in the fleet