According to the service history, our 2008 Jazz has always been filled with 5W-30 - 170-odd thousand miles and the engine hasn't exploded yet, so something must be right. Sounds like a sewing machine.
Main dealer serviced our 2015 last year, just before purchase, they used Shell Helix synthetic 5W-30. They've starting bugging the other half to take it in for another service, I'm afraid they're out of luck.