Below are the AMSOIL oil and filter recommendations for your 2005 Ford F150 4.6L 8 cylinder engine:
2005 FORD TRUCKS F150 PICKUP 4.6L 8-cyl Engine Code [W]
The 4.6L Triton V8 with iron block and aluminum heads puts out 231 horsepower with 293 foot-pounds of torque. This engine is a great 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 quarts of AMSOIL 5W-20 Signature Series 100% Synthetic Motor Oil ALM-QT which you can learn more about here: AMSOIL synthetic motor oil 5W20
You need the AMSOIL nano fiber long life oil filter for your truck which is: EAO34
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