Engine oil ZIC or Motorcraft

I ran motorcraft for like 70,000km's and switched to amsoil 5w50 after that.

I’m using Motorcraft 5W-20 Synthetic Blend in all my Panthers with 2500 mile change interval and no issues.

Used zic for several years with no issues. This year lang ako nagpalit ng ibang brand since nagmahal na zic dun sa suking auto supply ko.

I’ve been using zic oil for 6 years now. Ok naman I did not experience any issue.

I was having some issues with shuddering when the engine warmed up. Put in Motorcraft 5w20 synth blend in my 2015 XLT 5.0 and it’s been running like a champ

found some FORD Super Duty Diesel oil 15w40.....seems to work pretty well! ford aka motorcraft

ive always used motorcraft diesel oil. 10w30 in the winter and 15w40 in the summer.