小峰仔 發表：
目前世界各機油大廠都有DPF專用的機油~~
不 ...
MB 229.31和MB 229.51主要差別在229.51屬於長效型,換油哩程較長.都是以ACEA C3為基礎.
MB sheet 229.31 approved oils; LA "low ash" Oils
Mercedes pioneered this new spec for passenger cars with diesel engines with exhaust particulate filters, e.g. W211 E200 CDI, E220 CDI. The spec was introduced 7/2003. They are called LA "low ash" or "low SAPS" oils, low on sulfated ash, phosphorus and sulphur to limit exhaust particulate filter pollution. In 2004 the ACEA introduced the new C3 spec (mid SAPS, normal viscosity) based on it. Change intervals extend to 15,000 km.
MB sheet 229.51 approved oils; low ash long life
Mercedes pioneered this new spec for passenger cars with diesel engines with exhaust particulate filters, and gasoline engines, and longer service life than the 229.31 oils. The spec was introduced in 2005. Change intervals increased to 20,000 kilometers. Based on ACEA A3 B4 and C3.
資料來源
http://www.whnet.com/4x4/oil.html