Engine oil ELF or Motorcraft

I run motorcraft in my mustang and have zero complaints.

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

I've been putting 10w-40 ELF 70 STI regular oil in my 1.6 petrol from '98 for 3 years now with no issues.

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

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

5w40 for sure, my engine sounds happier, quieter, more sound than it did when the PO had 5w30 in it. So 5w40 is a given especially since you have a lot of Km on the clock, when it comes to the brand it really doesn't matter especially if you keep the oil change intervals reasonable.

I use Elf Oil and I change mine every 5-7k miles.

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.

I currently use ELF Exellium NF, Motul is good too I was tempted to get it....you can also check out ECS Tuning, they sell Lubro Molly now, I think that's gonna be my next choice and I might stick with it. I've used Amsoil for about 20K miles and liked it too. Otherwise, you can't go wrong with Castrol Syntec 5w40 either, I've used it since new all the way till 60K miles.