Nope, see @asemaster comments. It’s similar to the tougher specs BMW and VW came up with. Not ‘marketing’. Ignore at your peril if you have a vehicle under warranty.
Im required to use dexos, 0-20. Of course i read that mobil 1 has to pay for the label but all i checked had the label. Marketing or spec, i still have to use it.
Just for history i remember dad asking about whether to use detergent or non in the 58 chevy. They had both. Tractors used non but cars were switching to detergent. Some guys were arguing then just like now. Just follow the book.
Im just a consumer. When we bought the acura, at the new owners meeting, the service manager said be sure to change the trans, transfer case fluid, and dufferential at the first 10,000 miles. GM says nothing so i asked AI. Many mechanics recommend that, so thats what i will do. Along with 500 mile oil change. $36 well spent.
You guys do what you want.
Sorry, guess i read your post without remembering where i read jt.
I dont have any non-dexos, even for the small engines, but it might say meets tge spec in the small print on the back even though doesnt have the label. I dunno.
I frankly don’t think I’m taking any kind of chance at all. When I look at the 5 gallon containers of Mobil 1 the 5-20 sits right with the Dexos 0-20 and 0-30. If I look at all the specs all three are the same except the 5-20 that used to have the Dexos label, now doesn’t. Do you think Mobil degraded that 5-20 when they decided not to pay GM for the Dexos label? I don’t think so. I think it’s the exact same oil as before.
I just completed a rare long trip with my Volt where I used the engine most of the time. It ran like a top! My car has 103,000 but the engine probably has about 10,000 (Plug-in hybrid).
Not at all.
Chevy changed the oil ratings for the C7 Corvette to use 0w-40 DEXOS R. You can get NON Dexos 0w-40 oil which is the European formula. Ow-40 Dexos R (Supercar formula) is the ONLY one recommended by Chevy. And as of right now only Mobil-1 makes that formula.
Everything I’ve read (you should try it sometime) says GM’s DEXOS standard is extremely good. If GM calls for DEXOS standard, then I’d use it. In fact, I use it on our Toyota’s.hevy chabng
And neither do I. Mobil 1 is a quality product and has been my preferred oil for a long time. Sure, there are licensing issues, etc. and I also agree that the oil is the same as it was before. But the point I was trying to make is that Chris said any 5W20 is as good as any other 5W20, and that’s not true. Just like the 5W30 for a Chevy isn’t the right 5W30 for a VW. There are more standards to consider than the weight.
The late Tom McCahill, in his book published in the early 1960S, advised using motor oil one grade heavier than the specifications called for. He rrcommended taking a little more time to warm up the engine. He claimed his cars would go 80 000 miles without burning oil. He also didn’t like multiviscosity oil. He said that 10W-30 was a lousy number 10 and a lousy number 30. He also didn’t like detergent oil. McCshill said, “I prefer detergent in my bathtub and not.in my crankcase”.
I don’t know what McCahill would think of today"s synthetic oil. I had an old push mower with a Briggs and Stratton engine that was burning oil. Rather than put in straight 30 weight as callled for in the manual. I put synthetic 10W-30 in the mower. It cut oil consumption 80%. I got three more years out of that mower before it began burning oil.
I just want an engine that you can change the oil regularly in and not have it eat camshafts and lifters. I have a coworker with a 5.7 ram that ate a cam at 100k miles. Im old and young enough to remember when you could easily get 300k miles from a reliable smooth American V8 with nothing but basic maintenance
Now they have to have magical oil used just to make it to 100k if you are lucky. Some dont make it 20k before blowing up.
Is a 1992 Crown vic was the bad old days then take me back please!
There are hundreds of Dexos 1 approved engine oils, very few 5W20 on the list. Seems GM no longer recommends 5W20, there is no ACDelco Dexos 1 5W20 oil on the list.
There are 5 pages of Dexos 1 approved Mobil 1 varieties on the list, other than 5W20. I don’t think the licensing fee is a consideration.
Drive your Caprice and save the Tahoe for your grandchildren.
Those smoked because of leaking valve guide seals. In my area, all those smoking vehicles went to the salvage yard years ago.
The name or term “Dexo” just sounds gimmicky to me, can’t help it!
Like “Omnicord” on the face plate of a tape deck or VCR.
Yeah Mike: I’m ‘old’ -
in the head! 
The brand name similar to DEXRON (ATF).
What does OS in Dexos stand for? Oil Standard?
Based on what information?
Do you know how much they pay for each license?
Do you know if they have to certify to the latest standard in order to retain the certification? If so, how much time and money would that cost them?
Just because they maintain numerous other certifications does not mean the cost to retain this particular one, on an oil grade that has no future, is a financially sound decision.
As an example, our company maintains thousands of regulatory certifications and patents for our products. We constantly review them to decide if it makes sense to continue paying fees to maintain them. If not, they get culled from the list. Might only be a few thousand but that is foolish waste of money for something that has no return on that investment…
I’m at least a decade OLDER than you.
Instead of valuing how something “FEELS”, how about doing some research. There are books and articles on the subject.
We had one of Tom’s books from the fifties, sounds like he did not update it in the sixties. I do recall his comments on detergent vs non-detergent oil.
From what I have gleaned here and through other conversations, Mike must be a decade or more older than Chris. Chris just “seems” old! 
I doubt if Tom Mcahill was relevant even in his day.
He was definitely entertaining, due to his writing ability. As to his true relevance, I can’t say. But, he was either the first, or one of the first, automotive writers to “standardize” 0-60 runs as a significant part of his car tests.
Edited to add… One of Tom McCahill’s closest friends was the bandleader, Paul Whiteman, and he sometimes included little anecdotes about his adventures with Whiteman in his writing. Whiteman used to sign-off from his radio show by saying, “Now I’m going to Ma Colligan’s for a great dinner”, and McCahill wrote about some great meals at the same place.
Ma Colligan owned the historic Stockton Inn, in NJ, and now I enjoy both a beautiful country drive to get there, as well as a great meal in that historic building. Ma Colligan is… long gone… but the food is still excellent, and I think about both McCahill and Whiteman when I am there.
@VOLVO-V70 I bought into McCahill’s theory that that higher viscosity is better. I bought a new Oldsmobile Cutlass in 1978 with a 260 cubic inch V’8 engine. The owner’s manual specified that both 10W-30 or 10W-40 was acceptable for the engine. I mistakenly believed that 10W-40 would be better. I wss getting spark knock when I accelerated to pass another vehicle on the highway. About once a month
I would take off the aur cleaner and run Casite Motor Tuneup through the engine while it was running. I would also pour a can of Casite into the gas tank. I would then take the Oldsmobile out on the interstate. That would cure the spark knock for about a month. I was listening to CarTalk one Saturday and Tom and Ray didcussed that the polymers in 10W-40 could cause carbon buildup in an engine. I switched to 10W-30 and that solved the problem. I ran n the Oldsmobile 240,000 miles before I sold it. I never had to add oil brtween 5000 mile changes. I stopped believing in McCahill’s oil theories.