CedarPark68
Veteran Member
TS,Mercedes & BMW are both formulating their latest (MB 229.51/BMW LL04), diesel oils around the generic, ACEA C3-08 Specification. This requires a high temp, high shear rate viscosity of at least 3.5 Centipoise @150 C - regardless of if the oil is a thirty weight or a forty weight.
The ACEA, C3-08 Spec has these chemical limits:
Ash < 0.8%
Phosphorus < 900 ppm
Sulfur < 0.3%
These are also the limits for the VW 502.00/505.01 oils, which are considered "Mid-SAPS" products. The VW 504.00/507.00 and Porsche "C30" specs take this even further:
Ash < 0.65%
Phosphorus < 700 ppm
Sulfur < 0.2%
These are classified as Low-SAPS products....
Note: All these European OEM Specs are for both gas & diesel engines. The very low ash is to ensure long term, DPF performance. The reduced levels of P and S are to optimize the life of oxygen sensors, EGR valves and the latest three way catalysts ("TWC"), used on gas engines - particularly the direct injection models that may consume a fair # of oil.
For completeness, we have API/CJ-4:
Ash < 1.0%
Phosphorus < 1200 ppm
Sulfur < 0.4%
(Since this spec was defined to include the use of Group I & II, petroleum base oils, they had to allow higher levels of sulfur, which is inherently part of the base oil. The ash & phosphorus reflect the additive chemistry, so these levels can be manipulated independently).
TS
Can you throw one more to really round out your list?
: ACEA A3
Use of CJ4 oils is very popular, unknowingly using an A3 I'd also say is very 'popular'.