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- Skyactiv 2015 Mazda 6, 2.5L NA, Custom 91 Octane Tune
Never heard of a Skyactiv leaking oil. With the exception of the cylinder head issues on the turbo's, seldom do i hear much go wrong at all on these cars. I know I always talk about 300K KM plus (no leaks, ever...) on my Skyactiv 2.5, but really there are individuals on the same NA drivetrain who have nearly doubled this with barely any issue.