My apologies if this has been posted before, but I was just wondering about this. I have been using Mobil 1 (and usually Mobil 1 EP) in my car its entire life. However, after seeing the UOAs, some reviews, and a recent onset of a sticking valve on cold start up, I decided to give Pennzoil Ultra a try.
Picked up a 5 quart container at Walmart tonight and found this:
Now, what is interesting, is that Pennzoil Ultra no longer appears to be claiming that it cleans 35% better than its next leading oil, Pennzoil Platinum. Does anyone know why it is no longer doing so? What's changed? Anyone else notice this?
-Techniker
Picked up a 5 quart container at Walmart tonight and found this:

Now, what is interesting, is that Pennzoil Ultra no longer appears to be claiming that it cleans 35% better than its next leading oil, Pennzoil Platinum. Does anyone know why it is no longer doing so? What's changed? Anyone else notice this?
-Techniker