To summarize:
Mobil 1 T&SUV (formerly Mobil Delvac 1) 5w-40 SL/CI+ was replaced by Mobil 1 T&SUV 5w30 SL (NON-Diesel) as noted below. No telling how many diesels were damaged by not catching this fundamental change when Mobil took a respected name and changed what it did.
Where to go from here. If you have an older car that would benefit from HDEO, or a diesel, you can switch brands, looking for CI or CI+ rating and 5w-40 if synthetic. The names to look for is Rotella T, Archer and Delo (read the labels carefully). Do NOT fall for labels that imply but do not show the real certification label.
Some good news, I do not know if we are seeing old stock or if this is replenished pipeline, but I am seeing Mobil 5w-40 CI+ at truck stops and "rural" big box stores. Another place to get it is at truck repair shops that have Delvac signs on the outside of their shops.
A plea, could someone provide the product scan code for this "new" 5w-40? Most places will order it at no extra charges if you can provide the code.