About to order a new Mazda3 Takumi with the e-Skyactiv X, automatic, and before I sign anything I wanted to get a proper read on the engine itself since it seems like a genuinely different beast compared to the regular Skyactiv-G.
Daily driving will be mostly city, stop and go traffic, a decent amount of lights and jams since I live in a fairly busy European city. On top of that I'll be doing a longer highway trip roughly once every two weeks, a few hours each way. So it's really a mix of constant short trips at low revs most days, with periodic longer stretches at speed.
A few things I've picked up from other owners that I'd like people's honest take on, not trying to talk myself out of it, just want the full picture:
Spark plugs apparently don't last as long as you'd expect on this engine, some people report having them changed way earlier than the official interval and them being pretty pricey when they do go.
Carbon buildup and injector clogging seems to come up a lot for GDI engines in general and I've heard the X isn't immune, with a couple of people mentioning it can go unnoticed since it won't always throw a check engine light.
The supercharger itself apparently can develop a whining or grinding noise on some cars, sounds like Mazda has acknowledged this on certain units.
Given all that, is the X actually a sensible engine for mostly city and traffic use, or is that exactly the kind of driving that accelerates these issues since it never gets to breathe on the highway. And for the fuel side, is running standard 95 fine day to day, or is it worth deliberately running higher octane premium fuel with the stronger cleaning additive every so often just to keep things clean, since in my country the beefed up cleaning additive only comes in the 98 variant.
Also curious if there's a driving style that actually helps this engine stay healthy, like should I be deliberately revving it higher sometimes even in the city, or does the compression ignition side of things handle that differently than a normal petrol engine would.
Would really value hearing from anyone who's put real km on one of these, especially in a similar city plus occasional highway pattern, good or bad experiences both welcome.