04-10-2021, 08:40 AM | #15 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
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I will use 5w30 in my 2017 until it’s no longer available. No need to switch to 0W40 in my thinking because 5w30 is doing the job. To each his own is what I say!
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04-10-2021, 11:04 AM | #16 | |
Drives: 2023 CT5 Blackwing Join Date: Sep 2016
Location: Orlando
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Well, GM said the 5W-30 has been replaced by the 0W-40 in all LT1/LT4 applications. Your owners manual was written BEFORE GM revised the guidance. Most importantly, you can be sure GM was seeing some kind of trend across the LT1/LT4 fleet to make such a sweeping recommendation. If your oil cap confuses you, I suggest you head to your parts department and order a replacement. They all say 0W-40 now.
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04-10-2021, 11:48 AM | #17 | |
Drives: 2018 2SS 1LE Black Join Date: Aug 2018
Location: Cape Cod
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04-10-2021, 12:42 PM | #18 | |
Drives: 2018 Camaro ZL1 Join Date: Sep 2020
Location: Michigan
Posts: 251
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I'm not replacing anything, my car, I will do with what I want with it, simple is that! |
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04-10-2021, 10:22 PM | #19 |
Drives: 2018 Hyper Blue ZL1 1LE Join Date: Dec 2018
Location: CA
Posts: 1,360
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The recommended street oil from a cold weather, warranty and fuel economy standpoint is Mobil 1 0w40 ESP Dexos 2, and after about 2 years since GM announced this it is still the most overpriced oil on the market. It makes no sense that you can't get this basic oil for less than $8.30/qt. This stuff should be ~$5/qt by now and available in 5 qt jugs at Walmart, but Mobil 1 has decided to screw all new Chevy performance car owners.
My car rarely sees cold enough weather or goes long enough between track events for me to put anything but M1 15w50 in it, but when I do use street oil I use Motul 8100 X-Clean 5W40. This is a Dexos 2 oil, and Motul is highly regarded for quality. You can get this for under $8/qt in 5L jugs on Amazon. |
04-11-2021, 07:28 AM | #20 | |
Petro-sexual
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One thing I think about is oil pump issues... It's strange this change seemingly came up right around a lot of the hooplah about oil pumps. I don't know how 5-counts of anything in motor oil would do anything, but I'm not an expert in anything, and certainly not an engineer.
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04-11-2021, 10:28 AM | #21 | |
Drives: 2019 ZL1 Riverside Join Date: Apr 2020
Location: Charlotte, NC
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04-11-2021, 10:50 AM | #22 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,811
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My question would be, how many people switched to 0w40 from 5w30 and had oil pump failures? We will probably never know!
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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04-11-2021, 11:26 AM | #23 | |
Drives: 2023 CT5 Blackwing Join Date: Sep 2016
Location: Orlando
Posts: 1,618
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That's a great oil and it's what I used from 1st change until the new guidance came out. Always got good Blackstone reports with it.
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04-11-2021, 11:43 AM | #24 | |
Drives: 2018 Hyper Blue ZL1 1LE Join Date: Dec 2018
Location: CA
Posts: 1,360
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I don't think many very high HP modern performance cars use 5w30. Porsche, McLaren and Ferrari all use 0w40. At high heat, RPM, load, etc. the viscosity/film strength of Xw30 is pretty low vs Xw40 and above. The cold flow of 0w40 and 5w40 at low temps is probably not much different than 5w30. I don't see any benefit of 5w30 vs Xw40 other than cost. |
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04-13-2021, 12:42 PM | #25 | |
TEXIT
Drives: 2019 ZL1 M6 Join Date: Aug 2018
Location: Republic of Texas
Posts: 160
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04-13-2021, 12:49 PM | #26 | |
Drives: 2018 Hyper Blue ZL1 1LE Join Date: Dec 2018
Location: CA
Posts: 1,360
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Royal Purple 5w40 is not Dexos 2 afaik, it doesn't have that cert from GM right? If it doesn't you should not use it, unless you DON'T have a warranty anymore due to mods. If you DO have a warranty and an issue comes up, they'll definitely know you used non Dexos Royal Purple as soon as they look at the dipstick--it's purple :-) |
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04-13-2021, 04:04 PM | #27 |
TEXIT
Drives: 2019 ZL1 M6 Join Date: Aug 2018
Location: Republic of Texas
Posts: 160
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Correct, RP is only Dexos 1 certified and that's the 5w-30 I believe. I think my cars manual stats a Dexos 1 5W-30 is acceptable for street use in the LT4 engine.
I have no mods but I find it highly unlikely that any warranty issues would come up using a non Dexos oil. The Dexos moniker is just another revenue stream for them, making oil companies pay for the rights to have the All-Mighty Dexos label on there quart.. I don't think GM was testing oil on all the LT engine oil pumps that grenaded over the last few years. Did GM instruct the dealerships to send used oil samples to Blackstone? I doubt it. |
04-13-2021, 05:28 PM | #28 |
Drives: 2018 ZLE Join Date: Feb 2018
Location: Palm City Fl
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