Safe difference?
06-23-2018, 01:15 PM
#1
Team Owner
Thread Starter
Member Since: Jul 2016
Location: The Steel City, Colorful Colorado
Posts: 25,306
Received 1,679 Likes
on
1,182 Posts
Winner 2020 C7 of the Year - Modified
Safe difference?
Getting ready to do an oil change with Mobile 1 5W-30 Advanced Full Synthetic and just noticed that my 5 quart jug says dexos Gen2 and my quart sizes just say dexos. Is there any issue or difference if I mix a dexos with dexos Gen2 oil?
06-23-2018, 04:15 PM
#2
Thoroughly chapped
Member Since: Oct 2006
Location: If you're not angry, you're not paying attention
Posts: 20,355
Received 409 Likes
on
327 Posts
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17
NCM Member '09
Not that will apply to a C-5 no longer covered by GM warranty.
The following users liked this post:
FX VETTE (06-24-2018)
The following 3 users liked this post by Phanni:
06-23-2018, 07:41 PM
#5
Race Director
Member Since: Apr 2017
Location: Hickory NC
Posts: 10,211
Received 863 Likes
on
667 Posts
2022 C5 of the Year Finalist - Modified
2020 C5 of the Year Finalist - Modified
St. Jude Donor '17-‘18-'19-'20-'21-'22-'23-'24
According to the National Oil & Lube News:
Dexos1 Gen 2
The most current dexos1 specification (dexos1 Gen 2) was released in 2015 to provide even higher engine performance and protection, particularly low speed pre-ignition (LSPI) protection in small displacement turbo-charged engines.
GM has developed four new engine tests for this updated specification:
For more information about dexos1 Gen 2, visit: www.centerforqa.com/dexos/
So, is it better than the original Dexos ? Probably. However comments in other writings on the new generation Dexos speak more to the small, turbo engines, as briefly mentioned above.
Additionally, ACDelco Techconnect says:
“Since dexos1 Gen 2 is fully backwards compatible with all pre-2018 model GM vehicles, the previous generation of dexos1 generation will no longer be produced after this full transition.” Nothing there indicating any incompatibility between the two oils; just one has been improved.
Guess if you mix it, you will have Dexos1 Gen 1.5
Dexos1 Gen 2
The most current dexos1 specification (dexos1 Gen 2) was released in 2015 to provide even higher engine performance and protection, particularly low speed pre-ignition (LSPI) protection in small displacement turbo-charged engines.
GM has developed four new engine tests for this updated specification:
- New General Motors Oxidation & Deposit Test (GMOD) verifies the improved oxidation and deposit control characteristics.
- New Stochastic Pre-ignition Test verifies the added protection for turbocharged engines and pre-ignition concerns.
- New Turbocharger Deposit Test verifies the added protection for turbocharged engines and minimizes deposit formation, which ensures optimal performance during engine life.
- New Aeration Test (bubble control) ensures the air bubbles in the oil dissipate quickly to improve oil performance.
For more information about dexos1 Gen 2, visit: www.centerforqa.com/dexos/
So, is it better than the original Dexos ? Probably. However comments in other writings on the new generation Dexos speak more to the small, turbo engines, as briefly mentioned above.
Additionally, ACDelco Techconnect says:
“Since dexos1 Gen 2 is fully backwards compatible with all pre-2018 model GM vehicles, the previous generation of dexos1 generation will no longer be produced after this full transition.” Nothing there indicating any incompatibility between the two oils; just one has been improved.
Guess if you mix it, you will have Dexos1 Gen 1.5
The following users liked this post:
FX VETTE (06-24-2018)
The following users liked this post:
FX VETTE (06-24-2018)
06-23-2018, 11:19 PM
#7
Administrator
Member Since: Mar 2001
Location: In a parallel universe. Currently own 2014 Stingray Coupe.
Posts: 343,032
Received 19,309 Likes
on
13,980 Posts
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-
'20-'21-'22-'23-'24
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
You will be fine mixing the two. 
Last edited by Vetteman Jack; 06-23-2018 at 11:20 PM.
The following users liked this post:
FX VETTE (06-24-2018)
06-24-2018, 12:09 AM
#8
Team Owner
Thread Starter
Member Since: Jul 2016
Location: The Steel City, Colorful Colorado
Posts: 25,306
Received 1,679 Likes
on
1,182 Posts
Winner 2020 C7 of the Year - Modified
. Thanks for the responses.
06-25-2018, 09:55 AM
#10
Drifting
^^^ Yeah you'll be fine. The Dexos 2 standards have in a way superseded Dexos primarily as mentioned to address requirements of smaller gasoline engines. Your older Dexos 5w-30 will function in the same way as Dexos 2 5w-30.
Going forward you're likely not going to find in stores Dexos standard oil since Dexos 2 has replaced it. Unless you have some sort of power adders and/or accompanying modifications that necessitates running a different type oil for whatever reason your C5 is well within Dexos 2.
Going forward you're likely not going to find in stores Dexos standard oil since Dexos 2 has replaced it. Unless you have some sort of power adders and/or accompanying modifications that necessitates running a different type oil for whatever reason your C5 is well within Dexos 2.