Mobil oil makes 505.01 oils, they just don't sell them under their own distribution network in the US. You
can get it, just like you can get Bosal trailer hitches and Euro-spec lighting here.
brumbar, you cannot seem to grasp how vastly different the VAG TDI engines are than your giant OTR truck engines.
You also (like many others) seem to be unable to grasp the fact that ambient air temp has NOTHING to do with oil temps, as the oil temp just like the coolant temp is REGULATED via an oil warmer/cooler.
The PD engine does NOT have the same valvetrain as any unit injector heavy duty truck engine. The reason for the specific oil requirement is not because of the injectors directly. It is because the cam lobes that OPEN THE VALVES were reduced in width by about 30%, yet still need to opertate the same design hydraulic followers and open the same valves. You see, VAG puts the camshaft on the TOP of the engine, and its lobes drive the lifters directly.
OHC = over head cam
OHV = over head valve
All OHC engines are OHV by default.
OHV engines are NOT OHC....understand?
The VAG TDI 4 cyl engine has much more in common with a VAG gasoline engine than it does with some big Mack/Cummins/MB/CAT/DD etc. diesel. Can you grasp that? Can you grasp the fact that you are willing to use the wrong oil and change it twice as often and that is just silly?
Now this has all been quite humorous, those of us in chat are in stitches reading your posts, but enough is enough man. You are digging a hole in which you won't be able to climb out!
PS: are you brumbar by any chance related to a Phil Moore from Dixon, Illinois?