I always run my NEW cars 3,000 miles on dino oil BEFORE switching to Mobil 1. I have never had any problems doing this, no cars use an excessive amount of oil.
NOW, my 1998 Corvette came with Mobil 1 from the factory. It only uses a maximum of 1/2 quart in 6,000 miles, if that much.
Although the Corvette engine (LS1) is essentially the same as the Camaro, the Corvette specifies synthetic oil because of potentially higher oil temperatures. GM was too cheap to put in an oil cooler when they could specify synthetic oil (slight mileage and horsepower increases don't hurt either as well as a "kick-back" from Mobil for using their oil.)