So your first question probably is why do I need to worry about a C7 Corvette Oil Upgrade? The answer is simple, you don't unless you plan on tracking your car. The new oil upgrade for 2014 to 2018 C7 Corvettes was to solve an issue when utilizing your Corvette on track day events.
The process includes draining your street version oil and refilling your engine with an approved race oil blend 15W-50, then changing back again to 5W-30 after the track day by going back to the street blend. Well that sounds like a huge waste of oil, time and money! GM agreed, and for 2019 the factory oil fill is a new street/race blend that does not require changing your oil twice for track day events.
The new factory fill on all 2019 Corvettes will be Mobil 1 0W-40 ESP. This new blend can be used on previous C7 Corvettes 2014-2018. If you want, you can make this standard on your earlier versions of your C7. To start you can change the oil cap to match the 2019 version. Depending on your model, specific oil cap part numbers are available depending on your performance build.
As for the C7 Corvette Oil Upgrade oil you can go to your GM dealer which is available now and purchase the DEXOS2 version of the 0W-40.
You can also purchase the Mobil 1 ESP (Emission System Protection) Formula equivalent of 0W-40 full synthetic at most automotive oil sales locations starting mid 2018.
The 0W-40 began in Europe but in the USA we require the ESP spec oil for GM vehicles.
What is the ESP part of the Mobil 1 Oil specification? Low Sulfur & Phosphorous Content: Helps To Reduce Poisoning Of Gasoline Catalytic Converters. This is a major problem for newer cars. In the past high Phosphorous oils were destroying catalytic converters. In response to this manufactures have lowered the additives to extend the life of emission systems.
High Phosphorous oils attack the converter matrix coating and requires replacement of the converters when they fail. This is typically detected from the monitoring O2 sensor downstream of the Catalytic Converter.
On the flip side, older engines that depend on the additional phosphorous content to extend the life of metal to metal contact parts such as camshaft lobes began to fail. If you own an older engine without roller camshafts pick your oil wisely!
The 0W-40 oil has a weight of SAE 0W-40, meaning it has an SAE viscosity rating of 0 in cold temperatures and a rating of 40 at normal operating temperature. A numerical code system created by the Society of Automotive Engineers (SAE) grades motor oils according to viscosity--the higher the number between 0 and 60, the more viscous (thicker) the oil is. Most consumer motor oils are graded by two numbers, with the first number indicating cold weather (Winter or "W") performance.
For the hard core racer this will still be the first choice due to the temperature range and protection offered. This becomes critical for longer races with higher atmospheric temperatures. This type of car is no longer driven on the street. It spends its time in the garage, in the trailer or on the track and never see's a stop light.
The 2019 ZR1 Factory recommendations are still to use the 15W-50 for track events and switch back to the factory fill 0W-40 found on all the Corvettes. This car has 5 additional coolers to manage the demands of 755 hp in a tight package. The last thing GM wants is a repeat of the Z06 limp mode when tracking the cars. Hence the additional requirement for the 15W-50 oil.
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