Oil pump solenoids
#2001
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I assume all M157s have the external oil cooler (but certainly my S-model does). This adds a variable so we really can't compare our oil temps to M278/M276 cars in my opinion. I agree, during driving at speed, it's uncommon for the oil temp to be above coolant (at least the coolant reported in the cluster, which is phony and likely showing lower than actual). However, during low speed traffic situations where the external oil cooler doesn't get a lot of air, I will definitely see my oil temps pick up into the 200s. Just remember, in that scenario, you coolant temp may actually be warmer so it is possible your original statement is mostly correct under most circumstances (if we focus on actual temps only).
#2002
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MY'14 W212 M276 3.5NA @60kMi
COOL is BETTER... duh!
Here is what the conclusions say....
- LS.PI needs specific conditions
- a thin oil vapor droplets
- "highly elevated" intake temps
- extreme coolant temp
Do you happen to recognize that whole picture ???
It's exactly MOD-0 stock conditions.
For MOD'ers... this means we have some level immunity to burnt oil issues.
> IOW WHAT IS IT:
This is dieseling ie. self-igniting the lubricant that is said to have escaped through rings (intake as well!)
The remaining carbon is thought as a self-sealing soft carbon sort of lubricant. So the "approved oils" are designed to be burned in specific ways. Meaning the engine is expected to ingest oil that must be formulated for combustion.
Self-ignition has been around since day-1 of diesel tractors (circa 1900) with manually heated igniter.
when self-igniting temps are avoided...
guess what happen when MOD-2 engines don't consume oil.... Problem Cancelled!
Cooled pistons are good!
++++ WHATS CAUSES LS.PI ...
The stock provides "Approved" burnable lubricant:
+ Thin vaporized oil
+ pistons hot spots
+ Extreme temps
= setup for pre-ignition
> How to prevent LSPI:
Cancel every factors with effective piston cooling and SP rated oil with reduced calcium, low poly-unsaturated fats
+++++ The funny thing....
Novel engine issues have developed related to lubricants, cylinder scoring... have become popular. what if limited oiling what the root cause??
> Wet vs. dry rings:
The oil gets so hot in contact of extremely heated pistons, it flash vaporizes into gaseous form.
Rings have no chance to "wipe a vapor " ie. contain pressure on a dry ring is compromised.
+++++ FORGOTTEN PATHWAY... PCV
We all got focused on the oil migrating around pistons however the REALITY IS ELSEWHERE... PCV!
Quarts of the vaporized oil travels through intake plenum to get combusted, not so much through pistons rings.
> How Do I Know This???
-- When my hot pistons used to vaporizes quarts of oil on MOD-0 + MOD-1, I smell condensate oil from the open NA intake on MOD-1.
-- When oil doesn't vaporize into intake no consumption on MOD-2.1 or above.
We have cooling options not to struggle with engineered LS.PI crisis.
Last edited by CaliBenzDriver; 07-03-2024 at 04:07 PM.
#2003
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MY'14 W212 M276 3.5NA @60kMi
I assume all M157s have the external oil cooler (but certainly my S-model does). This adds a variable so we really can't compare our oil temps to M278/M276 cars in my opinion.
I agree, during driving at speed, it's uncommon for the oil temp to be above coolant (at least the coolant reported in the cluster, which is phony and likely showing lower than actual).
However, during low speed traffic situations where the external oil cooler doesn't get a lot of air, I will definitely see my oil temps pick up into the 200s. Just remember, in that scenario, you coolant temp may actually be warmer so it is possible your original statement is mostly correct under most circumstances (if we focus on actual temps only).
I agree, during driving at speed, it's uncommon for the oil temp to be above coolant (at least the coolant reported in the cluster, which is phony and likely showing lower than actual).
However, during low speed traffic situations where the external oil cooler doesn't get a lot of air, I will definitely see my oil temps pick up into the 200s. Just remember, in that scenario, you coolant temp may actually be warmer so it is possible your original statement is mostly correct under most circumstances (if we focus on actual temps only).
The low RPM slow traffic heat suffers from pre-existing extreme heat while driving.
This is a sort of heatsoak except the engine is idling.
Engine shows up hot and stays hot with no way to cool regardless of fan speed.
The heat moving pumps are tied to RPM.
#2005
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MY'14 W212 M276 3.5NA @60kMi
M157 OIL cooling uses a better system :
More oil heat can be removed directly when oil is circulated well.
Oil temps may not mirror that of other engines without cooler.
Everything else applies including limited spray efficiency below 3000.Rpm.
- regular coolant heat exchanger
- plus oil tstat for quick warmups
- and a serious oil cooler up front
More oil heat can be removed directly when oil is circulated well.
Oil temps may not mirror that of other engines without cooler.
Everything else applies including limited spray efficiency below 3000.Rpm.
Last edited by CaliBenzDriver; 07-03-2024 at 09:44 PM.
#2006
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I wanna be the first to share this. Mobil 1 0W-40 will shear down to a 30 weight in as little as a couple hundred miles!
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#2007
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W212 E63S Wagon - GSL580 - E63 - E350 - C300
I see these pics...My temps are ALWAYS opposite of the images. I am generally 10F higher on top, if I am driving a bit harder 20F higher on top.........only in the AM (and under 90F outdoor temps) are my numbers on the dash equal or lower on the top....should I worry?
#2008
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MY'14 W212 M276 3.5NA @60kMi
OldM always hotter
I see these pics...My temps are ALWAYS opposite of the images.
I am generally 10F higher on top,
if I am driving a bit harder 20F higher on top.........
only in the AM (and under 90F outdoor temps) are my numbers on the dash equal or lower on the top....should I worry?
I am generally 10F higher on top,
if I am driving a bit harder 20F higher on top.........
only in the AM (and under 90F outdoor temps) are my numbers on the dash equal or lower on the top....should I worry?
The jury is still out validating the oil temp display.
The only thing worthy of consideration are OBD Temps.
If you want to improve heat removal, provide better viscosity or consider JR's latest Pennzoil.
@JettaRed
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04 E55 AMG (totaled), 07 S550 4Matic, 14 E63S
I wanna be the first to share this. Mobil 1 0W-40 will shear down to a 30 weight in as little as a couple hundred miles!
https://youtu.be/2-ECI5uK9eE?si=I5lpbj53hQQU8yZP
https://youtu.be/2-ECI5uK9eE?si=I5lpbj53hQQU8yZP
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Rickman30 (07-05-2024)
#2011
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I wanna be the first to share this. Mobil 1 0W-40 will shear down to a 30 weight in as little as a couple hundred miles!
https://youtu.be/2-ECI5uK9eE?si=I5lpbj53hQQU8yZP
https://youtu.be/2-ECI5uK9eE?si=I5lpbj53hQQU8yZP
Last edited by Ultrakla$$ic; 07-05-2024 at 05:55 PM.
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Ultrakla$$ic (07-05-2024)
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I've wondered about all of us with DI engines using non-API SP oil (because it didn't exist) for years and thousands of miles. Our engines seem to have survived (or maybe not). Of course, API SP standards were set and oils were made in response to the issues with LSPI. Going forward, I will be using API SP rated oil only. My old stock I will save for my son's 2004 Audi TT (previously mine).
#2018
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I've wondered about all of us with DI engines using non-API SP oil (because it didn't exist) for years and thousands of miles. Our engines seem to have survived (or maybe not). Of course, API SP standards were set and oils were made in response to the issues with LSPI. Going forward, I will be using API SP rated oil only. My old stock I will save for my son's 2004 Audi TT (previously mine).
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2014 Mercedes-Benz E350
As it would turn out, the test came back "No contamination or abnormal wear" In fact they said this engine has less wear than the average they've recorded for the M276.
But the oil tested 10.6 cSt viscosity @ 100 degrees C, tolerance of a 40 weight oil is 11.6 to 15.3. So, picked up the Mobil 1 API SP the other day. Fingers crossed. Keep us posted on the Pennzoil, as it was a toss up for me as well.
#2020
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04 E55 AMG (totaled), 07 S550 4Matic, 14 E63S
My Molygen was 12.31 after 5000 miles (does include one makeup liter). My M157 is still on Molygen until I find something better to run. I highly doubt M1 0W-40 is better.
#2022
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I wanna be the first to share this. Mobil 1 0W-40 will shear down to a 30 weight in as little as a couple hundred miles!
https://youtu.be/2-ECI5uK9eE?si=I5lpbj53hQQU8yZP
https://youtu.be/2-ECI5uK9eE?si=I5lpbj53hQQU8yZP
Car manufacturers take this shear rate into account when testing oil for a given spec. Just because an oil crosses over from a 40 to 30 weight doesn't automatically mean your bearings will score. There's much more to how oil films protect internals than just viscosity. Mobil 1 0w40 is a good oil as a standard fill for most use cases, however if you are tuned and or drive aggressively there are certainly better options.
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Rickman30 (07-05-2024)