Every engine has a specific wear pattern, regardless of the oil used. Some oil analysis data from one of my personal cars illustrates this nicely ...
Vehicle--- 1990 Audi 100 (2.3L, 5 cylinder)
Mileage---170k to 194k (24k total)
Air Filter--- Amsoil Oiled Foam
Oil filter--- Amsoil SDF-15
Miles on oil samples--- 12,000 miles
Amsoil 10w-30/Amsoil 20w-50 Racing Oil(TRO)
Fe--62/20
Cr---5/1
Pb---15/7
Cu---42/15
Sn---1/0
Al---14/6
Ni---1/0
Si---16/5
TBN--5.9/8.2
As you can see, even though there is a dramatic difference in wear rates, the wear pattern and the source of the different types of metals is the same. This would also be true of the TDI engine ....
I want to stress I am not adverse to the idea of using a heavier oil if there is actual data to support its' use. Oil analysis is the best way to screen oils that I am aware of, aside from completely dis-assembling the engine and measuring the parts.
TooSlick
Vehicle--- 1990 Audi 100 (2.3L, 5 cylinder)
Mileage---170k to 194k (24k total)
Air Filter--- Amsoil Oiled Foam
Oil filter--- Amsoil SDF-15
Miles on oil samples--- 12,000 miles
Amsoil 10w-30/Amsoil 20w-50 Racing Oil(TRO)
Fe--62/20
Cr---5/1
Pb---15/7
Cu---42/15
Sn---1/0
Al---14/6
Ni---1/0
Si---16/5
TBN--5.9/8.2
As you can see, even though there is a dramatic difference in wear rates, the wear pattern and the source of the different types of metals is the same. This would also be true of the TDI engine ....
I want to stress I am not adverse to the idea of using a heavier oil if there is actual data to support its' use. Oil analysis is the best way to screen oils that I am aware of, aside from completely dis-assembling the engine and measuring the parts.
TooSlick