Thought I'd make a post to help out anybody looking to do their 500/1500 mile service. And actually any service after that point too.
Let's get started with Oil. The OEM used fluid on the ZL1 was Mobil 1 5w30. You can use that oil if you're just driving on the street/drag strip. If you're tracking, you'd want to request 15w50.
As I'm sure most of you know by now, Mobil 1 brought out a new oil with GM for the new LT5 and LTA (CT6-Vsport engine) and is now the standard fill for dealers on LT1 and LT4 engines as well. It's called Mobil 1 ESP 0w40 Dexos 2. Yes, long name. This is NOT the same oil as the current 0w40 Extended Performance or 0w40 European. This is brand new and is for the LT1, LT4, LT5, and LTA engines. For the LT4, it can be used for both street AND track use. I would highly recommend using this oil for ZL1s, ZL1 1LEs, Z06s, CTS-V3s, and LT1 based cars. In my case, I think the car idles and revs a little smoother, call me crazy but I'm not the only one reporting this. And the big benefit is of course it can handle both street and track use so no need for an oil change before a track day. This oil is ONLY available at Dealers at this time, it will be available to the public at the end of this year.
As for the differential fluid, you ONLY want to use the OEM ACDelco stuff. Don't let them put in anything else. The additive in the OEM fluid is critical to the eLSD.
I HIGHLY recommend noting the names and part numbers on your phone or a piece of paper when you go to take the car to service just to make sure you double check their work. Had I not been there, my service department was going to use a generic diff fluid and OEM 5w30 oil.
To make it easier, here's what you need to know:
Part Numbers and Names:
New Oil: 19370233 - Mobil 1 Dexos 2 0-40 ESP - 1 Quart (You'll need 10)
Diff Fluid: 88862624 - 10-4034 - 75W-90 ACDELCO 1QT (You'll need 2, mine took about 1.75-1.8 quarts)
0w40 Oil Cap: 12686472
Oil Filter: ACDelco PF64
While you're there, see if there are any open TSBs or updates for the car.
I have a Borla 60606 X Pipe on mine with a Corsa Xtreme 14784BLK axle back, which I installed at about 200 miles. So I had the tech re-torque all of the clamps. Happy to report they weren't loose or leaking at all, but it's always a good idea to check. If you want to read more about my exhaust setup, here's my thread on it:
https://www.camaro6.com/forums/showthread.php?t=528893
Hope this helps!