My aunt has a 2004 VW TDI with 152k miles, always serviced at the dealer with 10k miles OCI with synthetic. I've noticed the last 2 changes the paper says it is VW 504/507 oil. Is this oil spec back to the 505.01 it requires? I asked the service guy who has managed the service on her car for all these years and he said 507 back specs and works in this car. Is this true? Also the service sticker in the windshield says 5w30 on this oil change but the old ones used to say 5w40. Did they mess up?
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