The 2014 Lexus IS350 reminds the driver that "injector maintenance" is required every 10,000 km.
Besides this advisory annoyance, as far I can tell there is no difference in drivability.
I don't think this is a case of Lexus being over-protective. The engine utilizes gasoline-direct injection, so I imagine that this message relates more to the high-pressure direct injectors.
- What periodic maintenance do these direct fuel injectors need?
- Is it out of the realm of a DIY-er to perform this maintenance?