My C5 2012 had it's turbo crash by 50K km, timing chains, intake things etc replaced by 80K km, etc. I guess when I bought it now at 100K km, I got a car with 50% newer parts..

Since I learned about these things after purchase, but generally still like the car, I'm looking into simpler things I can do to keep the engine happy. First things that come to mind:
* petrol - only 98
* oil change every 10K km max (or is 5K km really worthwhile?)
* periodical intake cleanse?
* spark plugs swap - "often"?
* service guy: "avoid short drives, where the engine doesnt reach operating temperature" LOL, I like BMW/PSA contribution to individual fitness - instead of short rides, take a damn walk, right?
* EDIT service guy: let the engine idle a bit both pre-takeoff and post-landing, avoid oil burn buildup in the turbo pipe
Anything I'm missing?
https://www.etuners.gr/peugeot-citroen- ... icing-101/ also has a nice health list, but my newbie eye can't tell what is realistic to do and what is not.