We have learned specific information about full/approved use for Mobil 1’s new 0W40 motor oil for all C7’s Corvettes (with the potential later exception for the ZR1). Thanks to our colleagues at corvetteforum for raising this issue, especially their Technical Editor “jvp”, and “BlueDevilZ51.”
BlueDevilZ51 said:Do you recommend 2014-18 C7s use the new Mobil 1 0w40 dexos2 engine oil that has been announced to be the factory oil fill for 2019s. I'd prefer to use one oil instead of having to change from 5w30 to 15w50 for track use. If you don't recommend the earlier C7 using 0w40, why?
Tadge said: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.