ACEA B3 vs B4

[Pidziek]

Hi,
What is the difference between B3 and B4?
B4 reportedly has more cleaning power, and B3 more powerful lubricant ...

Can B4 is more resistant to oxidation, aging?

Does anyone know what these two standards differ?

 

[BobFout]

I am curious too, this is what I came up with.

http://www.lubrizol.com/EuropeanEngineOils/A3B308.html

http://www.lubrizol.com/EuropeanEngineOils/A3B408.html

 

[sxg6]

In addition to bobfout's links.

Heres a simple explaination

And more detailed
http://www.acea.be/images/uploads/pub/070308_ACEA_sequences_2007_LD_and_HD.pdf

 

[Eddie]

Reread. One for higher performance and DI engines

 

[BobFout]

Hm. This does not give me a warm-fuzzy about using ACEA A3/B3 Royal Purple in my TDI....