Mobil 1 ESP possibly using diblock polymer
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0w30 has esters while the new formula of 5w30 does not. Probably the 0w30 would clean better due to the esters.
Hope that answered your question
Interesting , plus the 5W30 ESP is SP rated while the 0W30 ESP is designed to meet . I now see WM stores carry both the 0W30 ESP and the 5W30 ESP but not both at the same store . I don’t live in a climate where a 0W oil is required as a 5W oil is fine (PNW) . How ever , if both are the same price - I want the better oil chemistry for engine cleaning , less deposits and wear .
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The ESP 5w30 is SP rated because it has below the maximum of Zinc and Phosphorus. The 0w30 would pass all the test but the amount of Zinc and Phosphorus is above the limit as it was designed for manufacturer specs not API specs first.
The 5W30 ESP should have a slightly lower NOACK than the 0W30 ESP . If running a GDI engine it may be a consideration (i.e. potential intake valve deposits with higher NOACK oils) . If NOACK for both is 10 or lower - then not much of a concern .
Any negatives for 0W30 ESP having more Zinc and Phosphorus added versus 5W30 ESP ?
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Unless you’re burning an extremely high amount of oil it wouldn’t be an issue. At excessive burn rates it could damage the catalytic converter
My store (Dickson, TN) shows to have both in stock currently.
I’ve been using the 0W-30 ESP in my Elantra N (and our Odyssey, in warmer months; in winter it’s been getting PP 5W-30).
You might take a look at the SDS of the current 5W-30 ESP versus the 0W-30 ESP!
1 of them has a better Base Oil, and 1 of them has More Esters than the other.
I'll be curious to see if the ESP 0w30 ends up looking more like the 5w30. Kind of interesting to see what oils Mobil is using ester (per oxidation value) in and what oils they're using something else. Kind of odd the 5w30 and 0w30 are different IMO. Wonder what the reason is.......ah the complexity of Euro specifications 
in a GDI engine the 0W30 ESP has been a good performer and could possibly keep internals a bit cleaner - however I will try the 5W30 ESP for my upcoming warm weather oil fill to compare both (which I run for up to a 4K mile OCI) .
Good comments ! … 0W30 ESP may have slightly better cleaning ability while the 5W30 ESP may produce less intake valve deposits (important for GDI) . Then again , Euro specs may cloud the issue a bit as both oils should be top performers … So , what exactly are the pro’s & con’s to both oils ?I'll be curious to see if the ESP 0w30 ends up looking more like the 5w30. Kind of interesting to see what oils Mobil is using ester (per oxidation value) in and what oils they're using something else. Kind of odd the 5w30 and 0w30 are different IMO. Wonder what the reason is.......ah the complexity of Euro specifications
I have a feeling the differences are minor or insignificant given your short OCIs and the lifespan of a car ... but I have been wrong before!
I see both ESPs at the store now with the same price ($2 cheaper than M1 EP I'm using) but I'm not buying any oil for a year or so unless there is a good sale. Lol
Past standards, approvals, etc. written on the jug, the only way I compare oil is which one burns less in my engine.
Curious about your plan of attack to compare!
My oil is black by about 3,500 to 4,000 miles / 6 month OCI (Hyundai 2.4L GDI) so I try to protect the timing chain from soot issues (abrasive) as well as keep engine internals clean and help reduce oil burning hopefully. If both the the 0W30 ESP & 5W30 behave about the same - I’ll focus on which one refuced oil burning (about 1 to 1.5 qrt. make up oil over the OCI) . If no difference in oil burning between the two ESP oils then I’ll move to VR&P 5W30 for a few OCI’s .I have a feeling the differences are minor or insignificant given your short OCIs and the lifespan of a car ... but I have been wrong before!
I see both ESPs at the store now with the same price ($2 cheaper than M1 EP I'm using) but I'm not buying any oil for a year or so unless there is a good sale. Lol
Past standards, approvals, etc. written on the jug, the only way I compare oil is which one burns less in my engine.
Curious about your plan of attack to compare!
Definitely keep us updated on if the ESP improves the consumption. I'm considering this after running several OCI of VRP.
It's unknown as the 5w30 could be using AN's in place of esters.
https://www.exxonmobilchemical.com/en/products/synthetic-base-stocks/alkylated-naphthalene
Patman
Staff member
How do ANs compare in terms of their ability to keep things clean inside the engine?
iirc @OVERKILL had posted some material from XOM dated in the late 2000's or early 2010's. Besides not all esters "clean".
A member here mentioned that the cleaning is built into the add pack, not AN. Link
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