Any name brand full synthetic oil; 5W-30, 0W-30,
0W-40, etc.

Brands such as Mobil 1, Castrol Syntec, et al.

All can be found at WalMart, AutoZone, even some
grocery stores and gas and go's.

Add a qt, let it settle for a few mins, check stick,
repeat if necessary. An Insp ll is not really needed
just because the oil is low...