I am probably going to use the Mobil 1 0W-30 Advanced Fuel Economy since it meets the Chevy - GM 4718M (Corvette spec) requirements. I have been using the 0w-20 in my Ford for around 2yrs and it does work, plus I talked to Mobil 1 and the tech said that it is safe to use up-to 5000mi without a change. I put the link below:
https://www.mobiloil.com/USA-English...l_1_0W-30.aspx