Motorcraft VS Acdelco 5w30 Synthetic blend

[hale]

Hi,

My 5.3l gm engine is making noise at cold start, it is valves lifters tick as per GM tech, the repair did not fix it, however I found that when I used Motorcraft 5w30 premium synthetic blend the noise is gone!, when I switched back to AcDelco 5w30 synthetic blend dexos , the noise is back. I thought Acdelco dexos is the best and recommended oil but I am disappointed!

What is really in motorcraft that makes the big difference, but I also notice (but not sure!!) that oil level was lower with mileage.

Do you think there is a difference between 5w30 and 10w30 motorcraft premium synthetic blend other than the 5 and 10?
Any advice please!

 

[mechtech2]

This also could have been the filter making the difference.
Even filters that are supposedly identical can be varied or faulty in their anti drainback valving.

 

[3putter]

Any of those Conoco / Philips clones (Motorcraft, TropArtic, Kendall) are great oils at a value price with a stout additive package. If it works for you, stick with it !