I will follow factory recommendations for oil changes and use synthetic oil exclusively. Probably 5W30 instead of 0W30 because this is an overhead cam engine that probably needs a smidgen more viscosity support, but I do like the 0W formulas for their quick penetration on start-up.
I don't know for sure, but judging from what GM and the rest of the industry has done with factory fill oil, it probably has special synthetic in it that is designed for proper break-in over the designated length of time/miles specified. This means NOT changing it right away for proper break in. Metallurgy and coatings have come a long way and engine break-in is quite different nowadays, especially with the newer oils.
www.tdiclub.com has members that have studied different oil types with oil analysis and with different oil change intervals and have found some surprising things, albeit with diesel engines, which arguably are harder on oil than gasoline engines. First, oil change intervals for proper synthetic oil of 10,000-12,000 miles are conservative! What most found was that synthetic oil doesn't accumulate extra metal nor deteriorate in its lubricating/protection qualities under normal conditions until way after 15,000 miles, if at all. Second, they found that changing oil sooner actually creates more wear components in the oil. This can be explained by some of the oil additives needing to be broken-in for a few hundred miles before they work at their peak. Most amateur and professional authorities seem to acknowledge that following the manufacturer's recommended intervals under normal conditions with recommended oil type is the best way to go, since there are other factors like contaminants and water that may accumulate with time/miles.
So changing the oil every 3,000 miles belongs in the early 1970's folks. Don't waste your time, money, or pollute the environment any more than you have to. Do other stuff to keep your vehicle in top shape. And make sure you use the recommended type of oil since each vehicle has design elements that require specific additive combinations such as to prevent contamination of catalytic converters etc.
Regards,
TM