Hello again,
just recieved the keys to my first car, JDM eg sedan vti.
previously it was owned by my old man, who only filled petrol n drove it for about half a decade, treating the engine like dirt and now its mine.
im worried that the car might stuff up on me on long distance drives eg. from dandenong to geelong

what can i do to improve the engines behaviour, and run a bit more smooth, i plan to scrap this engine when i get the cash.

thanks in advance.

EDIT: i forgot to mention, this car for more than 5 years has not been serviced (good ol honda engines) AT ALL, besides changing the oil for the first time a few weeks ago.