So, do we know what 507 oil does for cam lobe wear? Higher ZDDP levels is a typical solution, but maybe this adversely impacts the cats.The big deal about 505 and 507 is specific protection for cam lobe wear. 507 is for dpf and 505 is non dpf. The way the tdi engine is designed, it requires a specific oil to prevent premature cam lobe wear. Any modern diesel oil can deal with dpfs, but only 507 can deal with cam lobe wear prevention.