w213 e350 oil temperature
Member
Joined: Feb 2021
Posts: 120
Likes: 38
From: Australia
W213 e300 MY19 (Aus market)
My usual ambient driving temps are usually between 18-25’C. Driving at max 100km/h. Oil temp never exceeds 98’C. On a 40’C day once last summer it went up to 105’C.
However one time I did a 700km drive (one way) at ambient 36’C. It’s a gentle gradient downhill most of the way and I was opening up the throttle and driving at 130km/h often. I noticed then that my oil temp was up at a sustained 106’C then, sometimes hitting 107’C.
If my oil temp is at 105’C regularly then I’d switch to 5000km oil change intervals. Also I read somewhere that the oil temp sensor is at the oil pan at the bottom of the engine, so actual oil temps if they’re coming from the turbocharger, or at the cylinder heads, and cams may be much higher. Assuming your sensor is fine and calibrated, your oil is going to wear out quicker at higher temps, so frequent oil changes are a good idea.
Which begs the question, why is your engine running hot? Sustained heat is never a good thing.
However one time I did a 700km drive (one way) at ambient 36’C. It’s a gentle gradient downhill most of the way and I was opening up the throttle and driving at 130km/h often. I noticed then that my oil temp was up at a sustained 106’C then, sometimes hitting 107’C.
If my oil temp is at 105’C regularly then I’d switch to 5000km oil change intervals. Also I read somewhere that the oil temp sensor is at the oil pan at the bottom of the engine, so actual oil temps if they’re coming from the turbocharger, or at the cylinder heads, and cams may be much higher. Assuming your sensor is fine and calibrated, your oil is going to wear out quicker at higher temps, so frequent oil changes are a good idea.
Which begs the question, why is your engine running hot? Sustained heat is never a good thing.
Last edited by aks_19_ak; Oct 6, 2024 at 07:42 AM.
Joined: Nov 2016
Posts: 7,847
Likes: 3,498
From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Mine normally the same at 98°C, but will occasionally hit 100°C. But I have different engines.
MBWorld God!
Joined: Dec 2019
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Out Of Control!!
Joined: Apr 2019
Posts: 12,061
Likes: 6,857
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
stock nearly good....
What type of oil are you using ??
Consider upgrading to a better lubricant you're comfortable using.
Try to service no later than 5kMi...
the stock "10kMi interval" should be shortened.
Consider upgrading to a better lubricant you're comfortable using.
Try to service no later than 5kMi...
the stock "10kMi interval" should be shortened.
Last edited by CaliBenzDriver; Oct 6, 2024 at 02:20 PM.
