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[ANSWERED] New oil fill 0w40

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Old 02-23-2018, 07:01 PM
  #61  
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Originally Posted by Gearhead Jim View Post
My suspicion is that the oil thing may be a Corvette-only "problem". I'm inclined to believe that. I doubt there are many manufacturers who warranty the car for serious track use and also require using two different oils, one for street and one for track. Fewer still the owners who actually use their car that way. ??? I see plenty of non Corvettes at track days. Frequently, to my frustration, the foreign cars outnumber our lower priced Corvettes.

GM is probably trying to do us a favor by allowing just one oil (the new 0W-40) for street and track, and do themselves a favor by reducing engine problems from incorrect oil that can result in warranty claims that must be investigated and sometimes paid for.
I don't believe for a minute they are doing it as a favor for us. I do, however, think you are correct that Chevrolet is trying to reduce future warranty claims/costs.
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Old 02-23-2018, 09:52 PM
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Now that the specs for the new 0W-40 have been published, it looks to me to be a good oil for the guy who occasionally drives hard on the street or autocross, but maybe not so good for the guy who really gets things hot on a track:

HTHS viscosity at 150'C (about 300'f):

5W-30 = 3.1
0W-40 = 3.5
15W-50 = 4.5

There's more to oil quality than viscosity; but for track engines that get hot, I think it's pretty important.

I'll be waiting for LDB to comment on this.
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Old 02-24-2018, 02:06 PM
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For the people scaring people about losing their warranty....Let's not bs and say people's should worry about their warranty by following their Corvette Manual's oil recommendations. With that being said I'd still switch to the new oil but if it's in your manual anyone scaring you about losing your warranty is hitting the bong too much.
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Old 02-24-2018, 08:55 PM
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Originally Posted by Gearhead Jim View Post
Now that the specs for the new 0W-40 have been published, it looks to me to be a good oil for the guy who occasionally drives hard on the street or autocross, but maybe not so good for the guy who really gets things hot on a track:

HTHS viscosity at 150'C (about 300'f):

5W-30 = 3.1
0W-40 = 3.5
15W-50 = 4.5

There's more to oil quality than viscosity; but for track engines that get hot, I think it's pretty important.

I'll be waiting for LDB to comment on this.
Sincere question here. What's your concern with those numbers?
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Old 02-24-2018, 09:17 PM
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Originally Posted by 69427 View Post
Sincere question here. What's your concern with those numbers?
The HTHS viscosity is a measure of the oil's ability to lubricate and protect at high temperatures.
Generally, a higher number is better in that particular measurement.

The new 0W-40 has a higher number than 5W-30, but significantly lower than the 15W-50 which GM has been requiring for track (only) use. So although the new 0W-40 has other characteristics that should make it a good oil for enthusiastic street driving and daily use, probably better than 5W-30, it may be significantly less good than 15W-50 for track use or other conditions that produce oil temps above, say 280'f.

I too am bringing this up more as a question than a definitive statement, and looking for comments from whatever oil experts we have here.

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Old 02-27-2018, 09:23 PM
  #66  
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I understand that the new 0w-40 esp dexos 2 is recommended for all c7s except zr1 based on Tadge’s response. That being said is there a service bulletin or some other official documentation I can show my dealer? They claim they don’t have anything showing 0w-40 is indicated for use on 2018 or earlier corvettes. (And yes I’ve shown them this thread)
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Old 02-27-2018, 10:26 PM
  #67  
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Originally Posted by Gearhead Jim View Post
Now that the specs for the new 0W-40 have been published, it looks to me to be a good oil for the guy who occasionally drives hard on the street or autocross, but maybe not so good for the guy who really gets things hot on a track:

HTHS viscosity at 150'C (about 300'f):

5W-30 = 3.1
0W-40 = 3.5
15W-50 = 4.5

There's more to oil quality than viscosity; but for track engines that get hot, I think it's pretty important.

I'll be waiting for LDB to comment on this.
Jim I read a European spec sheet for the Dexos 2 0W-40 Mobil 1. The HTHS they cited was 3.76 at 150 deg C.
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Old 02-27-2018, 10:43 PM
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The number I posted is supposed to be for the new wonder 0W-40 for the Corvette, but that doesn't mean it's correct.

Either way, 3.5 or 3.8 are significantly below the 4.5 of the 15W-50.

If you can keep your oil temp below ~280 it probably doesn't make much difference; I went over 290' at high rpm in our C6 on some track sessions with ordinary 5W-30, next oil analysis was completely normal.
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Old 02-27-2018, 10:50 PM
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Originally Posted by Gearhead Jim View Post
The number I posted is supposed to be for the new wonder 0W-40 for the Corvette, but that doesn't mean it's correct.

Either way, 3.5 or 3.8 are significantly below the 4.5 of the 15W-50.

If you can keep your oil temp below ~280 it probably doesn't make much difference; I went over 290' at high rpm in our C6 on some track sessions with ordinary 5W-30, next oil analysis was completely normal.
290 is nuts! Upgrade radiator?
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Old 02-28-2018, 01:52 PM
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Just called my wholesale parts guy at my local Chevy dealer and he looked up the part number which is: 19370233 and said it showed as not available yet. He said maybe within the next 2 weeks to a month, it should populate in their system and give him a price.
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Old 02-28-2018, 03:34 PM
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Originally Posted by JumpingJackFlash View Post
290 is nuts! Upgrade radiator?
It was all stock and no oil cooler, but I was having way too much fun trying to keep up with some C7's on the track.
As mentioned, the next oil analysis was normal, we drove the car about another 7,000 miles after that before trading it in on our current C7.
At trade in time, the engine and tranny were still fine but the rest of the car was having too many problems and so we decided to dump it.

We've had the 2017 Z51 A8 for 10 months/10k miles and the only warranty work has been to reset the alignment, which has also been out of spec on our previous three new Corvettes.
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Old 03-08-2018, 05:11 PM
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Originally Posted by Cconway84 View Post
I understand that the new 0w-40 esp dexos 2 is recommended for all c7s except zr1 based on Tadgeís response. That being said is there a service bulletin or some other official documentation I can show my dealer? They claim they donít have anything showing 0w-40 is indicated for use on 2018 or earlier corvettes. (And yes Iíve shown them this thread)
Replying to this question for a bump. My local dealer has the new ESP 0W-40 Mobil 1 in stock, but can't use it for one of my included oil changes without some kind of official service bulletin from GM. What's the hold-up in communicating this to the dealers?
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Old 03-26-2018, 09:10 PM
  #73  
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Originally Posted by Bob Paris View Post
GM has not validated this product for C5/C6 so stay with 5w30
Unless you live in Europe then 0-40 is what is listed.... funny how that works sans EPA!
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Old 03-29-2018, 12:20 PM
  #74  
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Anyone have better experiences with their dealers on getting this 0w40? I just called mine and ended up arguing with the parts guy. They claim that it's only for Camaros, only for 2019 and not for resale to customers. This was on a bulletin he claims was given to them 2/1/18. I reminded him it's almost April and then he hung up.

Tadge, has this information been disseminated? In Naples FL they clearly have no idea about the answer you posted.
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Old 03-29-2018, 12:26 PM
  #75  
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The rollout on this oil has been an absolute joke, GM should be ashamed of themselves. They get everybody all hyped up on this new oil, promise it'll be widely available in dealers for Feb 1st, and then here we two months later and barely any dealers have it in stock and most don't even have a clue that it exists in the first place.
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Old 03-29-2018, 12:59 PM
  #76  
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Originally Posted by mirage2991 View Post
Unless you live in Europe then 0-40 is what is listed.... funny how that works sans EPA!
There was a very long discussion about 0W-40 in the C6, back in the C6 section several years ago. Lots of people produced literature showing that the importers/dealers of the C6 were recommending 0W-40 and even putting stickers on the cars about it. But no one, at that time, was able to show a GM Owner Manual, GM bulletin, or other official direction from GM; recommending 0W-40 in the C6.

Has something new come up since then?
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Old 03-29-2018, 04:41 PM
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Originally Posted by Gearhead Jim View Post
There was a very long discussion about 0W-40 in the C6, back in the C6 section several years ago. Lots of people produced literature showing that the importers/dealers of the C6 were recommending 0W-40 and even putting stickers on the cars about it. But no one, at that time, was able to show a GM Owner Manual, GM bulletin, or other official direction from GM; recommending 0W-40 in the C6.

Has something new come up since then?
I remember the thread but can't tell ya if that changed or not. What was always interesting to me is all my Porsches have had 0-40 for oil fill, none ever had 5-30. At any rate I've used 0-40 since day one on my ZR1 and don't plan on changing, so 5-30 0-40 and even 15-50 for race days in hot climate would be fine in my book, though again, 0-40 has given me good oil pressure during hpde and higher oil temps...my opinion, not worth loosing sleep over "omg le gasp is 0-40 ok?"...yes, yes it is
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Old 03-29-2018, 06:34 PM
  #78  
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Performance chevy in Sacramento had no clue. They have no 15w50 and no 0w40, i told them you better get some quick if you're selling 2019 vettes 🙄
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Old 04-03-2018, 03:20 PM
  #79  
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Originally Posted by Pacembellum View Post
Performance chevy in Sacramento had no clue. They have no 15w50 and no 0w40, i told them you better get some quick if you're selling 2019 vettes 🙄
In all fairness, I've had some ordered (several dozen cases) for over 2 months with our GM oil supplier and we still have not received. We've already sold several 2019 Corvettes and I still don't have the factory recommended oil for them. I can't speak for all dealers, but in my case it's a GM supplier issue and not a dealer issue.

The correct part number is 19353135 and retail cost (per 1 liter bottle) is $11.32 at full list price.

This is not the same Mobil One 0w40 that we've all had in stock for years.

As of today I have still not seen a bulletin from GM that allows this for use in all 2014-2018 Corvettes or anything that says they will cover the additional charges under the maintenance plan on the earlier models. I see it posted in the answer from Tadge, but nothing from GM yet.
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Old 04-15-2018, 06:47 PM
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Default 0W-40 not officially approved by GM for oil change on all C7s.

Today I went to McMulkin Chevrolet to get a 10000 miles oil change on my 2015 C7 Z51 expecting to get the 0W-40 Mobile 1 oil. I was told by the service manager that GM has not yet sent a bulletin informing them to change to the 0W-40 Mobile 1 type except for the 2019 C7. They would do it but then I am responsible for engine. I told them to fill it with what GM recommended.: 5W-30.. and notify GM of the disconnect between customer expectation and GM bulletin
I was told if they found out that the 0W-40 is the officially recommended one then they call me and would change the oil again to the recommended type.
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