[Hammer]

Different dealers use different oils, so your best bet is to ask the service advisor when you take in your car what brand and weight oil they use.

I would use a name-brand non-synthetic motor oil for any new car. (Pennzoil/Valvoline/Quaker State are all good brands)

Check your owner's manual for the recommended weight of your oil. (Most likely 5W-30 or 10W-30)

That's about it...

Have fun with your new stang!