Being more or less the SP / GF6 / D1/Gen 3 rated flagship 0W20 , 5W30 synthetic oils of Mobil for North America , it is believed according to newer data that esters have been reduced in the M1 EP oils . If this is the case , how has M1 changed the EP formulation and still continue the cleaning / performance M1 EP oils are historically noted for with higher ester amounts ?
New M1 EP ("Triple Action Formula") Formulations : Reduced Esters ?
- Thread starter ChrisD46
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MolaKule
Staff member
Esters aren't the only cleaning chemistry available.
Dexos2 approved?
Based on virgin oxidation readings over the years, the ESP/0w40 oils had some Group V. The EP oils showed a low oxidation reading. It is believed they use AN's, but only XOM knows.
I don’t believe this. OVERKILL ran M1 EP in his truck and HPL purged lots of gunk that M1 didn’t touch.
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They make that claim?
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They do. It's all over their website when you click on certain Mobil 1 varieties. Has been part of their marketing for years now.
OVERKILL
$100 Site Donor 2021
Many oils claim to clean-up sludge. Sludge isn't adhesive, so you are essentially just rinsing it away. By far the easiest deposit to eliminate. It's varnish and lacquer that are hard to remove because they bond to the metal and require something with high solvency to break them down and remove them.
As I pointed out in another thread, it's interesting that Mobil claims their FS 0W-40 cleans, not cleans sludge, just cleans. That mirrors my experience with it liberating the same sort of carbonaceous grit in our old Expedition that myself and others are seeing with HPL.
I’m skeptical I guess. I like seeing things in person. HPL works for me so I’m not changing
Very helpful ! Group V is perhaps the better term to use here ...
Good point !
You are exactly correct - especially stated regularly by Mobil with M1's High Mileage and EP oils .
*Which exact HPL oil did you use ?
4WD
$50 site donor 2024
A good synthetic should clean as it lubricates - this Mobil 1 AFE 0W20 has just 2k on it
"helps remove sludge in one oil change" is what's written on the back label...nothing is written about cleaning up all sludge in one oil change...I'd suspect many detergent oils would remove some sludge in an engine that has sludge in it...YMMV
Bill
Bill
The keyword here is "helps". Another carefully written marketing statement that is very general and its not clear what it means in real application.
OVERKILL
$100 Site Donor 2021
The oils are in my signature, but in case you can't see it:
- The SRT has HPL Super Car 0W-40
- The RAM has HPL Super Car "overkill" 0W-20 (same additive pack as the 0W-40, but in a 0W-20)
OVERKILL
$100 Site Donor 2021
To an extent. You need a base oil with high solvency to remove varnish/lacquer, most vanilla PCMO's don't have those in them either at all, or in sufficient volume. Mobil is hit and miss on this front, the FS 0W-40 clearly does, but virgin oxidation on the PAO version of the EP 0W-20 didn't imply any ester content. They could have used some AN, but it is hard to tell without ICP.
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