Hi

I wouldn't say there is much, if any difference, in wear properties of 505.01 and 507.00. 507.00 oils tend to meet the newer specifications (not just VW specs, but Merc, BMW etc as well), but the 505.01 oils have high levels of antiwear additives. 507.00 oils are designed for long life service intervals and low emissions vehicles, 505.01 are for standard intervals in PD engines (so generally not low emissions). Unless you are covering a lot of miles, I would change the oil at 10k/annually and use either the 505.01 or 507.00. If it burns a drop of oil, 505.01 is often the better option as they are usually 5w-40, so a little thicker than the 0w-30/5w-30 507.00 oils. If covering a lot of miles, 507.00 is sensible. The problem with the long life service intervals and not doing a lot of miles is that if the oil doesn't get hot enough to evaporate off any fuel and water in it, there is a build up and that ruins the oil.

505.01 - VW / Volkswagen 505.01 Semi & Fully Synthetic Car Engine Oil
507.00 - VW / Volkswagen 507.00 5w30 Fully Synthetic Car Engine Oil

Cheers

Tim