VW is requiring the use of 505.01 compliance with their new TDI direct injection motor. They state in black and white that if you do not use oil to this standard, motor damage WILL follow. Now Mobil 1 passes 505.00 but I am not so certain if this standard is the same as 505.01 I can find no data on what the 505.01 test requires other than this is all about HTHS numbers. These new VW engines have some extremly highly stressed parts centered around the camshaft drive to the direct injection compononents. Any thought or links would be of help.