In perusing the latest Bentley's, the brand new VW 2.5L engine has relatively relaxed, older-spec oil requirements indicated: A2 or A3, or VW 500.00. The A2 minimum requirement is particularly noteworthy. Bentley's was also very careful in underscoring the much more rigorous oil specs for the TDI and turbo engines. Again, this is from the Bentley Publications service manual. While not an "official" publication, Bentley has enjoyed defacto authoritative status for decades. It also appears consistent with what I have already determined so far - the 2.5 is a much, much easier engine on oil than its TDI and small-sump turbo siblings. It opens up a much wider variety of options. A full synthetic is obviously not necessary with those requirements if OCI's are prudent. As the 2.5 is a new engine with great promise and future production ahead of it, I thought I would share this very interesting information with the Veedub owners.