cvp33

Just curious if anyone is switching to the 0w40 as GM is now recommending for the Z06? I have a 2016, I can't imagine that anything materially changed in the LT4 engine from 2015-2019. Thinking that the new requirement is good insurance for both GM and us owners. I may be a little paranoid as well as I had my first motor replaced at 15K miles for a bearing failure. #2 journal bearing failed and ate itself. All others were fine.....really a strange failure. My thought was a machining error, wrong bearing size, no oil journal, etc.

Anyway, anyone switching? Looks like Mobil 1 and Castrol all have 0w40's with Dexos2 certification.

https://www.centerforqa.com/dexos-brand2/

Castrol Edge dexos2™ 0W-40 GB2C1214082

Mobil 1 ESP dexos2™ 0W-40 GB1A0917015

Mobil 1 ESP Formula dexos2™ 0W-40 D20679HJ015

tobaccokid

Anyone who is not an engineer cannot have any experience or knowledge of what takes place on any high technology business. Failures, both those easy to understand and those that are more unusual will. Always occur with any device. No sense worrying much about them here, other than beating them to death with people who do not understand the engineering involved.

I use the ESP oil in my 2016 Z06 because Mobile, or any company in person involved with technological products knows orders of magnitude more than any of us, even though I am an engineer in a different discipline. Will all recommendations work out - no, of course not. That”s life in the real world I”m afraid.

cvp33

No one was beat to death. Engine was replaced by GM. No one trying to understand advanced engineering. Just a car enthusiast asking if others are switching to 0w40 dexos2 oil given GM's new recommendation. I don't think the mechanics of the LT4 changed over the last 4 years in anyway so thinking something else is behind the switch to 0w40. GM engineers usually don't make a change that is not necessary......I did say usually.

Larry M

If the dealership had it at my last change, I certainly would have

Basil2000

I had my dealership change my oil last month with the new recommended 0-40. This was my regular track prep that they do for me with the brake flush with dot4. This oil will keep me from having to do oil changes after every track day as i do street drive my car a little. Car is 2015

cvp33

grwiley

I had my dealership change to 0 - 40 Mobil 1. It was the most expensive oil change the dealer has ever done ($182). I had them order a case of the oil and had them slip the other 2 and a half bottles in @ $11.32 each so it ended up $135.82 just for oil. After I did find it online for ~$7. Don't know why there is a sticker on the bottles that they are not for sale to the public. I just had the car at Lime Rock for 2 track days and oil consumption was the same as 5 - 30. I have a 15 Z06 with 20K on the odometer.

Always Red Dave

Do we need this oil change if we do not track our Z06's?

FastestBusaAround

That's the Mobile 1 European Car motor oil, same as my 911 TTS takes. I was unaware that GM had switched to that oil in the 2019's.

ronsc1985

Not required. Use whatever your user manual specifies.

3 Z06ZR1

No and the 5-30 oil is just fine more important to make sure to use a PF64. To pay 182 for an oil change? I get two 5 qt jugs for less than $50.00

mallett435

My dealer recommended switching my 2018 Z06 to the new oil for track days. Nice to not have to switch the oil back and forth.

cvp33

5w30 is NOT recommended for track use. Manual states to change to 15w50 for 2018 and older. New 2019 Corvettes (all) come filled with 0w40 factory fill.

cvp33

As stated above, manual calls for 15w50 for track use, let's not void someone's warranty for using the wrong oil during track use. New manual appears to state that 0w40 is now approved. Hence the thread. I'd like to see GM update for all MY's 2015 - 2018.

ronsc1985

Did you miss the part where the OP said he wasn't tracking the car?

qwksvt

MontanaBob

Please provide a link to that Bulletin.

Thanks

Montana Bob

cvp33

I'm the OP, but yes I missed that, SORRY. Can't find any updates for the 15-18, just the 2019.

http://gmauthority.com/blog/2018/02/...m-the-factory/

3rdgrey

To the OP: I was wondering the same thing. Just got an 18' last week. No mention of a new type of oil or why. I called a service advisor and he seemed clueless. What's the difference? There's no mention of it for Zl1's (which I traded). Same motor. 18 or 19, no difference. Must be an environmental issue.

cvp33

Appears to be both a performance (oil performance) and a catalytic converter longevity issues.

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!