Just did a regular check in on the oil I use, Mobil Super Synthetic 5w30. The 100* viscosity is now 8.4! What the heck is that? I tow to the max with this truck (2013 Silverado). I guess I’ll be switching back to Mobil 1 soon. Do people think Mobil 1 ESP 5w30 would be good in a 4.8 LS with VVT? Despite not technically being Dexos certified? Back in the regular Mobil 1 Dexos 1 Gen 2 days I had a bunch of valve clicking/ticking (thats what makes me think of using ESP).
Mobil Super Synthetic 5w30 Spec Change
- Thread starter CapitalTruck
- Start date
wemay
Site Donor 2023
Can you share the link? A cSt @100° of 8.4 falls into a Xw20 range, not 5W-30
Edit: I see it. That's a publishing error and probably should read 9.4. 8.4 can never be a 30 which range from 9.3 to
www.mobil.com
Edit: I see it. That's a publishing error and probably should read 9.4. 8.4 can never be a 30 which range from 9.3 to
Mobil Super™ Synthetic 5W-30 | Mobil™ Motor Oils
Mobil Super™ Synthetic 5W-30 is a full synthetic motor oil designed to help extend engine life in vehicles of any age.
www.mobil.com
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I always find these posts funny because I can image some guy 'updating' the information just copy and pasting line by line thinking "man, this is such a waste of time, I bet no one reads these". Just to have some guy not only read them, but to also post about them and other people comment about his copy and paste mistake. 
What a funny world we live in, also proves there is no job too small/insignificant.
What a funny world we live in, also proves there is no job too small/insignificant.Noticed that too few days ago. Viscosity at 100 is indeed 8.4 for the Mobil super 5w30!
I’m going to shoot them an email.
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I wondered about Those figures too. Glad someone is checking it out.
Got this from XOM today:
Thanks for reaching out to us Jeremy !
We apologize for that, the info online is definitely wrong.
Typical viscosity @ 40C is 63.3 cSt and typical viscosity @ 100C is 10.93 cSt.
I hope this helps !
Very Respectfully,
Ramón A. Caballero
Americas Technical Help Desk
ExxonMobil Lubricants Technology
Thanks for reaching out to us Jeremy !
We apologize for that, the info online is definitely wrong.
Typical viscosity @ 40C is 63.3 cSt and typical viscosity @ 100C is 10.93 cSt.
I hope this helps !
Very Respectfully,
Ramón A. Caballero
Americas Technical Help Desk
ExxonMobil Lubricants Technology
After the online spec questionability (I changed the oil before I heard back from
XOM) and after the odor of charred oil after a heavy, hot trailer pull, I switched back to Mobil 1. I’ll probably just keep using that.
XOM) and after the odor of charred oil after a heavy, hot trailer pull, I switched back to Mobil 1. I’ll probably just keep using that.
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