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Mobil1 TDT in 2008 ML320 CDI OM642 ? #4521168
09/20/17 10:32 AM
09/20/17 10:32 AM
Joined: Oct 2008
Posts: 1
Middle GA
DrewKeen Offline OP
DrewKeen  Offline OP
Joined: Oct 2008
Posts: 1
Middle GA
What are the thoughts on doing this in GA? I figure the car will like a thicker viscosity in the heat here.

Is the main reason for the different spec from the I6 CDI the emissions equipment?
If so, would this oil be acceptable for an offroad only vehicle with this no longer attached?

Re: Mobil1 TDT in 2008 ML320 CDI OM642 ? [Re: DrewKeen] #4524497
09/24/17 01:24 AM
09/24/17 01:24 AM
Joined: Mar 2009
Posts: 3,196
BobFout Offline
BobFout  Offline
Joined: Mar 2009
Posts: 3,196
If the information presented by Mobil is correct "your vehicle manufacturer recommends a 0W-30, 0W-40, 5W-30, 5W-40 or 5W-50 viscosity and oil that meets MB-Approval 228.51, MB-Approval 229.31, MB-Approval 229.51 or MB-Approval 229.52.", then an API HDEO like TDT is similar to specified oils (MB 228.51 - in terms of sulfated ash, important for DPF longevity) except ZDDP is slightly higher (than 229.31/229.51).

Unless it's under some kind of extended warranty, use away. Also consider Rotella or Delo 5w40. A good spec oil would be Valvoline Synpower 5w40.

2003 VW Jetta TDI (Sold) / 2015 VW GTI 2.0T
Re: Mobil1 TDT in 2008 ML320 CDI OM642 ? [Re: DrewKeen] #4524785
09/24/17 11:01 AM
09/24/17 11:01 AM
Joined: Jun 2009
Posts: 1,381
m37charlie Offline
m37charlie  Offline
Joined: Jun 2009
Posts: 1,381
If emissions are deleted you can revert to 228.3, 228.5, 229.3/5 as per
Mobil 1 TDT is not MB-Approved but is equivalent to a 228.31 which is NOT recommended for a DPF equipped MB car diesel; just a DPF equipped MB heavy duty truck engine. It has too much ash for the small DPF on newer MB diesel cars.


05 Unimog U500/Unicat camper/Delvac 1 SHC ACEA E4/E5
09 BMW X5 35d/Delvac1 LE 5W30
88 Toyota OJ50LV OM314 motor D1 SHC
52 Dodge M37/Hercules diesel

Re: Mobil1 TDT in 2008 ML320 CDI OM642 ? [Re: DrewKeen] #4525373
09/25/17 12:48 AM
09/25/17 12:48 AM
Joined: Mar 2012
Posts: 5,572
Colorado Springs
edyvw Offline
edyvw  Offline
Joined: Mar 2012
Posts: 5,572
Colorado Springs
Get Valvoline 5W40 MST that is available in NAPA for $5 when on sale. Meets MB 229.51.

15' Toyota Sienna AWD (Mobil1 0W20 EP+ 2qt of M1 0W40 + FRAM Ultra).
11' VW Tiguan 2.0T (Castrol 0W40+MANN filter)

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