Below are the AMSOIL oil and filter recommendations for your 2006 Ford F150 4.2L 6 cylinder engine:
2006 FORD TRUCKS F150 PICKUP 4.2L 6-cyl Engine Code 
Your 4.2L engine with iron block and iron heads puts out 202 hp @ 4350 rpm and 260 lb-ft @ 3750 rpm. This engine is a perfect candidate for AMSOIL synthetic motor oil and hopefully you are looking to take care of it long term.
Here is what you need:
You need 6.1 quarts of AMSOIL 5W-20 Signature Series 100% Synthetic Motor Oil ALM-QT which you can learn more about here:
You need the AMSOIL nano fiber long life oil filter for your truck and the model is EAO34.
To learn how to get wholesale dealer pricing and the fastest and easiest location to get Amsoil for your Ford F150 go to where can I buy amsoil oil.
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