Originally Posted By: SumpChump
I went to a TOYOTA dealer a few hours away. Asked for TGMO at the counter and Penzoil was put in, unknown to me.. Now... it's beside the fact that Penzoil Platinum is a fine oil and is pizie dust to some folks but I noticed a change in the sound of my Corolla. Seriously, it was louder, especially on cold starts
I went back and asked... sure enough Penzoil and not the TGMO I wanted. Again, to the Penzoil fanboys who are about to post,,, I don't care if it is great oil. Its not what I was sold or told or wanted.
I got a refund. I got it out after the 1k miles and back in went the TGMO. Sounds like it should now.
They will probably nominate you for "customer of the year" after that.
Maintaining a good working relationship with your dealer is paramount if you ever bump into a serious situation with your car that requires them to make a call like "is this covered under warranty or not".
To the OP's topic, I wouldn't worry about TGMO or for that matter any commercial 1st tier engine oil (Pennzoil/Mobil/Castrol) in your vehicle.
Even 2nd tier stuff like Warren or Valvoline will do a great job at 5,000 mile OCI's.