Take a look at the engine bay of either the new 2027 Corvette Stingray or Grand Sport you’ll notice something else that’s new. The Mobil 1 oil caps now read 5W-50 instead of the outgoing LT2’s 0W-40. With that change Chevrolet confirms that the 535-horsepower LS6 is meant to be a far more serious performing engine than the outgoing LT2 V8, and the added benefit of standardizing one motor oil to all Corvettes should benefit both consumers and dealerships alike.
One of the defining characteristics of Chevrolet’s new LS6 engine is the new dual main oil feed system that helps keep crucial engine components well lubed. By moving to the thicker 5W-50 factory fill motor oil, the LS6 gains higher high‑temperature viscosity, resulting in better protection at extreme RPMs and under lateral- G loads. While we know the C8 dry-sump oil system can be sensitive to oil aeration and pressure stability, thicker high-temp viscosity should help maintain pressure longer, especially during long-duration high-G driving events.
Better high RPM stability is another advantage of the new motor oil. As engine RPMs go up, so does the load on the valvetrain and bearings. 5W‑50 resists thinning out, allowing the LS6 to safely rev higher without collapsing the oil film.
Another huge change for the LS6 versus the LT2 is the increase in compression from 11.5:1 in the LT2 to the 13.0:1 in the LS6, which is the highest ever for a Corvette V8 engine. Higher cylinder pressures created by this jump are better managed with 5W-50 motor oil.
The higher temps generated by the LS6 are really what we are talking about here. Mobil 1’s Supercar 5W‑50 formula is built for extreme heat. It holds its viscosity longer, resists oxidation, and stays stable even after repeated high‑temperature cycles. That’s exactly what a performance Corvette engine needs.
The standardizing of 5W-50 across the Corvette lineup means there is no more guessing which oil your Corvette needs. From Stingray to ZR1X, the factory fill and recommended motor oil are all the same. Same bottles, same specs. For dealer techs, one performance oil for all corvette models standardizes the maintenance experience and will hopefully eliminate mis-fills.
Related:
[VIDEO] A Look at the GEN 6 LS6 Engine’s New Lubrication System
[VIDEO] Take a Deeper Dive into the New LS6 and How It Compares to the LT2
Mobil 1 Rebrands ESP Formula 0W-40 as Mobil 1 Supercar
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You mean the tinted water they use in just about everything now isn’t good enough for a “performance” engine? I just don’t believe it.
Is GM taking preventative measures like they did with the 6.2 in Pickups and Tahoes going to 0W-40 from 0w-20?
Is this ‘new’ Mobil 1 Supercar 5W-50 going to replace the 0W-40 for my 23′ LT2 Stingray?
Well that sucks. Rotella T6 doesn’t have a 5w50 variety. I still don’t trust Mobile 1 anything. Diesel oils will always be allowed to contain more detergents (by law). Might end up using AMSOIL or something.
Is this really the best oil for all Corvette engines? Or are they trying to ensure that their lowest on the totem pole employees who changed the oil of Customer’s cars have less F ups? The first two oil changes are free from Chevrolet and both of them were overfilled. The second one by at least 1 quart.
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