So GM is now using Mobil1's new 0w-40 ESP with dexos2 rating for all new 2019 Corvette's, and as you will see from a reply from Tadge Juechtner, Corvette Chief Engineer, he's recommending that all C7 Corvette's from 2014 onward switch from the previous 5w-30 recommendation to this new 0w-40 ESP formula. In fact, M1 says you can use it in all previous Corvette engines that called for a dexos approved oil. Specs below are from M1. Interesting in how they compare. If GM is recommending this new 0w-40 for all of the LT1 GenV motors, than I'd probably want to run it over the 0w-20 oil they call for in the L86 6.2L in my Yukon Denalli, as it is essentially the same engine as the LT1 that comes in the C7 Corvette, (different exhaust manifolds and different intake manifold, but other otherwise identical.) M1 0w-40 ESP dexos2 Product Data Sheet
Tadge answered: Yes, the new Mobil1 OW40 Dexos 2 oil (Mobil 1 ESP Formula 0W-40) is also the recommended oil for all C7's prior to 2019. This oil was specifically developed to meet all of GM's performance requirements during engine dyno testing, vehicle road testing and performance track testing including the 2014-2018 Corvettes (all models). The Multi-grade Mobil 1 ESP Formula 0W-40 synthetic motor oil has many benefits including exceptional fast oil flow at startup along with low temperature pump-ability and exceptional viscosity/performance characteristics at high-temperature and high-RPM operating conditions. We are still refining our recommendations for the LT5 in the upcoming ZR1, so they may differ.