For Gen2 Motorcraft FL-500-S filter w/ 6 qts of Amsoil XL 5W-30 Full Synthetic
I would also use an Amsoil EAO17 if I didn't have the Motorcraft.
For Gen1 6.2L: Motorcraft FL-820-S filter w/ 7 qts of Amsoil XL 5W-20 Full Synthetic
Amsoil filter option is the EA011.
...and you know Amway has nothing to do with Amsoil. Although yes, the independent dealers who sell Amsoil products do it via a multi level marketing structure.
Interesting info was posted earlier in an oil change thread. included this link:
http://www.bullittarchive.com/5000/5003/Oil_Filter_Cut-Away_Comparison_Kit.pdf
and there's this if you're really geeking out:
https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/
---------- Post added at 05:37 AM ---------- Previous post was at 05:20 AM ----------
The manual recommends the Quaker State
where are you seeing that?? Not in the Gen2 Manual. 2018 Manual says, "Recommended motor oil (U.S.): WSS-M2C946-A
Motorcraft® SAE 5W-30 Synthetic Blend Motor Oil
XO-5W30-QSP"
and the Gen1 (2012) it's
"•Motorcraft SAE 5W-20
Premium Synthetic Blend
Motor Oil (US)
or
•Motorcraft SAE 5W-20 Full
Synthetic Motor Oil (US)"