OM651 vs OM642 oil jelling
Junior Member
Joined: Aug 2020
Posts: 55
Likes: 2
From: Hyderabad, Telangana
EQC, S Class Extended, Grace CVT.
Baloney belongs in the Deli, not oil threads.
The MB 229.5X oils were designed as light duty diesel engine oils with ash dispersants, They are ACEA C3 class oils that happen to also be suitable in many gasoline engines.
By the "logic" employed by some, many HDEO oils are also gasoline rated, so they must not be good for diesel engines!!! Don't use that Rotella or Delo, it's for gas engines!!!
Dual rated oils are desirable from a logistics and bean counting view. Being a professional logistician for the Navy/Marine Corps for 35 years, I am pretty sure that purchasing, shipping, storing, and handling one product is less expensive and more efficient than having to do the same for multiple consumables. Especially for bulk items.
Hence, "rationalization" by the OEM to dealer network and vehicle fleets to one oil that meets multiple requirements.
MB doesn't spec thin, watery, inadequate oil. The 0/5W-30 229.5x oils are almost as thick as a 40. It's the HTHS >3.5 that is the defining spec that makes many other oils not meet C3, MB, BMW, and VW specs.
Many truck fleets are running SAE 30 oils in their big engines on the highway. It isn't too thin.. They're all >3.5 HTHS oils.
Old ways go with old engines. People still swear by diesel fuel and transmission fluid oil flushes. It's antiquated and should go the way of heating houses with coal.
SAPS content greater than .08 isn't good for DPFs in any DPF equipped Euro diesel car by any OEM. BMW and VW spec the same low SAPS.
Your engine, your money, don't care what you do. But don't tell other people that you know more than the people who designed the engines and oil. Saying MB spec oil is inadequate or bad or only for gasoline engines is false, wrong, and harmful.
The MB 229.5X oils were designed as light duty diesel engine oils with ash dispersants, They are ACEA C3 class oils that happen to also be suitable in many gasoline engines.
By the "logic" employed by some, many HDEO oils are also gasoline rated, so they must not be good for diesel engines!!! Don't use that Rotella or Delo, it's for gas engines!!!
Dual rated oils are desirable from a logistics and bean counting view. Being a professional logistician for the Navy/Marine Corps for 35 years, I am pretty sure that purchasing, shipping, storing, and handling one product is less expensive and more efficient than having to do the same for multiple consumables. Especially for bulk items.
Hence, "rationalization" by the OEM to dealer network and vehicle fleets to one oil that meets multiple requirements.
MB doesn't spec thin, watery, inadequate oil. The 0/5W-30 229.5x oils are almost as thick as a 40. It's the HTHS >3.5 that is the defining spec that makes many other oils not meet C3, MB, BMW, and VW specs.
Many truck fleets are running SAE 30 oils in their big engines on the highway. It isn't too thin.. They're all >3.5 HTHS oils.
Old ways go with old engines. People still swear by diesel fuel and transmission fluid oil flushes. It's antiquated and should go the way of heating houses with coal.
SAPS content greater than .08 isn't good for DPFs in any DPF equipped Euro diesel car by any OEM. BMW and VW spec the same low SAPS.
Your engine, your money, don't care what you do. But don't tell other people that you know more than the people who designed the engines and oil. Saying MB spec oil is inadequate or bad or only for gasoline engines is false, wrong, and harmful.
We don't need 50 or 60 weight oils. We are far advanced beyond that trivial age.
