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I got an interesting email from Mobil 1 today. Please see attachment. I didn't realize that it was developed just for Corvettes.
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Lance,
Hey, I thought you might be interested in this attached flyer. It's our official release regarding the 0W-40, and includes a couple of tidbits that were news to me. I hadn't realized that GM was approving the 0W-40 retroactively for model years back to 2011 when Dexos was introduced.
I know a lot of people will be happy to see the return of the Mobil 1 logo on the oil fill caps, too. I wish I knew if the new caps were going to be backwards compatible with any earlier models. I seem to remember seeing that the thread/mount had changed once or twice over the years. If it is, I can imagine that GM will have a line of Corvette owners around the block trying to get one.
Thank you for choosing Mobil,
Jim
Mobil Help Desk Team Lead
Thanks for the info. Comparing the data between the current FS 0W-40 and the ESP, there are definitely some differences included less Zinc and Phosphorus content (as expected), but it is dexos, so for those still under warranty the ESP is the way to go. Curious to hear what the oil connoisseurs (cough, cough Patman) think of the ESP compared to the FS.
I think it's going to be a step up from the current 0w40 FS formula, which has actually gotten a little bit worse than before, as they've dropped the BMW LL specification and it doesn't have as much PAO in it's base oil either. I was running the 0w40 FS in my wife's BMW up until last weekend, and then switched it over to the European made Castrol 0w40 (which does have the BMW LL spec)
So far everything I am reading about this new 0w40 ESP looks good, and I'm very anxious to run it in my car when it arrives at Walmart. I was hoping it would arrive soon enough to do it on my first oil change, but I can't wait until summer to do my first change, I'm planning on doing it in the next few weeks actually. So I will start running it in my C7 on the second oil change.
One thing that gives me confidence in this new 0w40 is the fact that it's been specifically designed for our Corvettes. It's not often you get an oil company that makes an oil specific to one engine like this. That alone is huge! Even though M1 5w30 is a great oil that has served Corvette owners well for many years, I do believe the LT1 has different needs, with it's direct injection and AFM. Those two things place different demands on the oil than the LSx engines did. I also like that this oil has an HTHS value of just over 3.5, vs 3.1 for 5w30. That provides a bit more protection under hard usage and high oil temps. But it's also not too thick that it will hurt MPG either (most probably won't even notice a difference at all)
The dry sump itself hasn't changed, so the 0W-40 cap is exactly the same as the 5W-30 cap.
The same applies to the wet sump cap, which does not fit the dry sump. However, the valve covers haven't changed either so 5W-30 and 0W-40 caps will be interchangeable on them as well.
I am scheduling my 500 mile oil change for next Saturday. I'm going to make a point to ask them to put in 0W40 and I believe someone got a new cap through dealer for less than $10.
Wet sump caps are less than $10. Dry sump caps are 3X that for some unknown reason, not currently in stock, and back-ordered 3-4 weeks. I ordered one a couple of weeks ago.
Wet sump caps are less than $10. Dry sump caps are 3X that for some unknown reason, not currently in stock, and back-ordered 3-4 weeks. I ordered one a couple of weeks ago.
I ordered from ChevroletOnlineParts.com and the cost was $23.12 plus $15.12 for shipping, which yes, I know, is ridiculous. They are the ones who told me it was back-ordered 3-4 weeks.
I ordered from ChevroletOnlineParts.com and the cost was $23.12 plus $15.12 for shipping, which yes, I know, is ridiculous. They are the ones who told me it was back-ordered 3-4 weeks.
Just ordered one as well... Thanks. There was no picture or description other than "GM oil cap" so I am trusting you on this one buddy
I am on the fence on how this oil can be as good as if not better than the recommended 15W50 for track use.
I am totally cool with just running 0W-40 for the street. Track however, I need someone to sell me on using this oil for track. Track days subject our motors to tremendous stress where it would only benefit to have a really viscous oil like 15W50.
Last edited by Checkmate1; 02-22-2018 at 09:24 PM.
Thanks for the info. Comparing the data between the current FS 0W-40 and the ESP, there are definitely some differences included less Zinc and Phosphorus content (as expected), but it is dexos, so for those still under warranty the ESP is the way to go. Curious to hear what the oil connoisseurs (cough, cough Patman) think of the ESP compared to the FS.
I ordered from ChevroletOnlineParts.com and the cost was $23.12 plus $15.12 for shipping, which yes, I know, is ridiculous. They are the ones who told me it was back-ordered 3-4 weeks.
Foosh,
Have you seen a picture of the new one? I looked it up per your above part# but there was no indication what it looked like.
Yes, I saw a picture on the forum somewhere, but I was also told on the phone by the Chevrolet Online Parts guy that it's just like the picture on my new '18 (built 1/18/18), only it says 0W-40, and the dexos™ logo and oil weight are swapped, top to bottom.
I also find it rather ridiculous that a car built 6 working days before the '19 switchover were filled with a different oil, but I suppose the engine was built and filled some time before that.
02-22-2018, 03:20 PM
Mobil 1 ESP Formula 0W-40 update
