40k mile change for a Skyactiv Turbo seems conservative. Manual says gas Skyactiv-G engines need to be changed at 75k miles or so but real world experience should be good through 90k.
That said I'd do a quick inspection at 40k miles recommendation myself and hopefully if they are in good condition with good looking gaps I'll change them at 60k miles.
That said I'd do a quick inspection at 40k miles recommendation myself and hopefully if they are in good condition with good looking gaps I'll change them at 60k miles.