Originally Posted By: GMBoy
Originally Posted By: volk06
Originally Posted By: GMBoy
The factory fill oil is a conventional Mobil oil similar to 5000. You can run it as far or as short as you want. I tend to like to run my first oil change to 2-3,000 miles and dump to get rid of casting and other new debris.
Enjoy the truck - it was built in my plant. Any problems shoot me a PM and I can help.
We built our last 2012 in June and went to 2013's.
I dont believe this is correct. All vehicles now have DEXOS in them which is at minimum a synblend. It also has a completely different additive package than mobil super line up. The additive package is almost identical to motorcraft, even though they're made by two different oil companies.
Heres a UOA of what GM factory fill oil looks like.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2344122
Well, I do work at the assembly plant and see Mobil 55gal drums.... I did also say "SIMILAR" to 5000. But I was wrong - I meant to say similar to the Mobil 7500 which was a semi-syn. Your point well taken. The Super Syn as well as Mobil 1 meets Dexos. I will go out tomorrow and read the label on the drum and see what it says. Even though our engines come from Powertrain already filled...we are required to use the same exact oil for repair use, topping off etc.
Per UOA and voa, doesn't the super syn and super 5000 have the same additive package? Very interesting. I know the AC Delco oil bottles look identical to the super bottles.