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Old 07-31-2020, 09:15 AM   #99
turbo2ltr
 
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Quote:
Originally Posted by wjones14 View Post
So 2016-18 owners should buy a new cap like this one:

https://www.amazon.com/gp/product/B0...sc_act_title_1
Thanks! Ordered.

Amazon has M1 0W-40 ESP for $53.43 right now.
https://amzn.to/3jYhbQU
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Old 07-31-2020, 09:20 AM   #100
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Quote:
Originally Posted by TrackClub View Post
I think we are in a proverbial loop here

GM has not changed recommended oil. It is still 0w40 Dexos2 (or 5w40 Dexos2) or 5w30 dexos1 gen2 depending on intended use.

What GM had changed is factory fill from 5w30 to 0w40.
They've also made the latter available to the dealers, who didnt carry it until then (so they couldnt service track going cars unless ower brought his own oil).

Ive tried to explain it all in my OP on page 1
I agree we're in a proverbial loop. And also greatly appreciate the time and effort you put into this thread - definitely a wealth of information.

But I respectfully disagree with your statement that GM has not changed the recommended oil.

My 2018 manual clearly says that 5W-30 dexos1 is the recommended oil. Also, the oil fill cap says the same thing. Then there is a caveat in the manual for track use, where they recommend the 0W-40 or 5W-40 dexos2.

The 2020 manual clearly states that 0W-40 dexos2 is the recommended oil. Period. The manual does add a caveat saying "If 0W-40 dexos2 oil is not available, SAE 5W-30 dexos1 full synthetic engine oil may be used for street use." So 5W-30 dexos1 is an official alternative, but not the recommended oil.
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Old 08-01-2020, 04:00 PM   #101
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Anyone picking up a new oil cap, check the inside for excessive plastic flashing. Probably wouldn't ever cause an issue, but I cleaned mine up.
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