The last 5qt. container of Mobil 1 that I bought at Walmart had the Dexos 2 listed as well as Dexos 1.

I posed the question here at the time but got no responses.

Silverfox

Hmm, we’ll have to read the small print and those fancy labels, I just checked a quart of Mobil 1 5W30 it shows Dexos but no numbers

From the Mobil site https://mobiloil.com/en/motor-oils/mobil-1/mobil-1 Dexos1 gen2

Specifications and approvals
Mobil 1 5W-30 synthetic motor oil meets or exceeds the requirements of:

API SN, SM, SL, SJ
ILSAC GF-5
Ford WSS-M2C946-A
Ford WSS-M2C929-A
Mobil 1 5W-30 has the following builder approvals:

General Motors Service Fill dexos1™ Gen 2 (license number D10104GH015)
Honda/Acura HTO-06
Mobil 1 5W-30 is recommended by ExxonMobil for use in applications requiring:

General Motors 4718M
General Motors 6094M

Blue,

I think many places are still selling older inventory.

I have had many questions on product labeling over the years and it is still continuing.

Some store employees with the Dum Dee Dum mentality are not careful about restocking and moving old stock forward.

Silverfox

Don't know...
Go to the Mobil1 website to find out, or look for Dexos2 on the jug...:twothumbs:

Hmmm, if it states Dexos2 on the jug, then uh... ya... it meets Dexos2 specs...:gnonespet:

Well yes .. but at the time, I looked up Dexos 2 on Google since I did not get any opinions/replies here.

The info I saw then explained it as to the fact Dexos 2 could be also used in Diesels and not specifically and upgraded Dexos 1 for gasoline engines.

Not what I would call Clear Labeling for all consumers.

P.S. I ordered the Pennzoil on Walmart on line since they did not carry it in our local store but after 4 weeks they cancelled the order because the stated it was not available.

Mobil 1 Oil. Dexos 1 Gen 2
 

Which oil to use is always a very interesting topic. I have used Mobil 1 in my 2.0 engine for the past 100,000 miles and so far my engine does not use a drop of oil. I change oil at 7500 miles. At 95,000 miles I sent a sample with 6,800 miles to Blackstone laboratories for an evaluation. The report indicated that the oil was in very good condition with no contaminants at harmfull levels. The recommendation was that I could run the oil for an additional 2,500 miles. I have used Mobil 1 in all of my vehicles over the past 40 years. It might not be the best oil :thumb:but it works for me!

This is the specification's from the Mobil 1 site. I hope this help's.

Available viscosity grades What does this viscosity mean?
0W-20 5W-20 5W-30
Specifications and approvals
Mobil 1 Extended Performance 5W-30 synthetic motor oil meets or exceeds the requirements of:

ILSAC GF-5
API SN, SM, SL, SJ
ACEA A1/B1
Ford WSS-M2C946-A
Ford WSS-M2C929-A
Honda HTO-06
Mobil 1 Extended Performance 5W-30 has the following builder approvals:

General Motors dexos1™ Gen 2 (license number D10107GH015)
According to ExxonMobil, Mobil 1 Extended Performance 5W-30 is of the following quality level:

General Motors 4718M
General Motors 6094M
API CF
Technical details
SAE Grade 5W-30
Viscosity @ 100 ºC, cSt (ASTM D445) 10.6
Viscosity, @ 40 ºC, cSt (ASTM D445) 59.8
Viscosity Index 169
Sulfated Ash, wt% (ASTM D874) 0.8
HTHS Viscosity, mPa•s @ 150 ºC (ASTM D4683) 3.0
Pour Point, ºC (ASTM D97) -40
Flash Point, ºC (ASTM D92) 230
Density @ 15.6 ºC g/ml (ASTM D4052) 0.851
View product data sheet for Mobil 1™ Extended Performance 5W-30

So, it all boils down to , “Use what ever brand you like, so long as it meets specifications “ Synthetic, not crude!


https://cimg6.ibsrv.net/gimg/www.che...2d92e09b8c.jpg

For some time I was using Pennzoil Ultra Platinum in Gregg. The price was about 28 dollars for 5 quarts. Then, something happened after the release of the Challenger Hellcat, which is a widly popular car and well received, being factory filled with the stuff, now either it is never in stock, or the price skyrockets to 60+ dollars for five quarts. Even the "lesser" version, Pennzoil Platinum, is skyrocketing in price. Its silly. I switched back to Mobil 1 because of it.

I bought my first 5 qt. Mobil 1 @ Walmart on sale for $19 and change plus tax 2 months ago.

Just bought a new jug yesterday for 25.47 Plus tax

Should have bought several looking back but wanted to try it first.

One note on changing to Mobil 1.

I have noticed No cold start "occasional rattle" since the change.

We'll see.

Silverfox

I think the whole point of the original post was to point out the coking in the valves problem in the SS 2.0 turbo charged , direct injection engines.
So run what you brung.
I will ask why synthetic oil rises in price faster when the price of crude goes up on the stock market? Same with gasoline.
And don’t get me started on OPEC!

General Motors dexos Licensing Program
 

I found this information that I think will best serve to clear up the Dexos 1 Gen 2 question of which oil can you use in the 2.0 engine.

About dexos® | GM dexos® Licensing Program

Read the article and go to the bottom of the page and click on the Licensed dexos Brands. There are a lot of different synthetic oil's on the market that are suppose to be dexos 1 Gen 2 compliant. :twothumbs:

Coking on Turbo Bearings
 

This is an interesting article concerning coking in Turbo bearings. The article recommends letting your engine idle for 30 to 60 seconds before shutting the engine off. The article also discusses contamination which is why I think an occasional oil analysis is a good inexpensive preventative measure.

General Information

The coking problem with the 2.0 LNF is an intake valves coking issue. Really nothing to do with their turbo having any coking issues.

From their site:
"Welcome to Chicagoland Chapter GSCA our Chapter's website. Please take a few minutes to look around and see what we have to offer the performance Buick enthusiast. Our primary interests include 1965 to 1972 Gran Sports, 1984 to 1987 Turbo Regals, and Supercharged 3800 Buick powered cars while offering support for any performance Buick enthusiast."



Yeah, this concept has been discussed here before, consensus is that the Ecotec LNF is a different animal from the older turbo cars. The cool down is unnecessary. You can probably find those threads with the search function.