Any name brand that meets the spec would be fine. Shell, Mobil, Chevron etc. Just avoid the funky branded stuff. Depending on volume you use there could be savings dealing with an oil distributor vs buying at the parts house etc. I pay about $6.15 a gallon bulk for my Shell 15w40. At work it's higher, not exactly sure why, around $10.75. Still beats $15 a gallon at the parts house.
Junkyard