Prior to 2019, Corvette owner manuals recommended switch to Mobil 1 15W-50 for track use. In 2019, with the switch to Mobil 1 0W-40 ESP, this is no longer officially recommended. However, when I recently attended the Corvette Owners School at Spring Mountain, they said they still use exclusively the Mobil 1 15W-50. That seems like a good idea to me - the higher HTHS for the hard driving on track. Who cares if its not Dexos2 certified. However, it seems the heavier weight would not be good for start-up. My understanding is that the biggest advantage of 0W oils, regardless of climate (Spring Mountain is outside Vegas, so it's not "cold"), is the faster circulation on start-up. Thus, I was looking around for any 5W-50 or 10W-50s that might serve this role when I finally take mine to the track. I'm in North Carolina and would likely go to VIR. I came across the two below from Ravenol. Anyone have experience with these? I'm still pretty new here, but I gather that ester-based oils are very good...
https://www.ravenolamerica.com/motor-oil/10w-50-motor-oil-ravenol-high-viscosity-ester-hve/
https://www.ravenolamerica.com/moto...racing-motor-oil-rrs-racing-rally-synto/
https://www.ravenolamerica.com/motor-oil/10w-50-motor-oil-ravenol-high-viscosity-ester-hve/
https://www.ravenolamerica.com/moto...racing-motor-oil-rrs-racing-rally-synto/