Me and my friend were discussing the death of his old car, a Peugeot 207, he believed that constant speeding on the motorway is what caused his car to die.
the UK limit for speed is 70mph, and he would most likely be doing average speeds of 90-100mph on a 220 mile round trip, done roughly every weekend.
It was an average car (probably 70k miles, 9 years old etc), he also admitted that he knows little about cars and was just a hunch or probably what one random mechanic told him.
Knowing my friend personally for over a decade I know he wouldn't have been very "preventative" with his maintenance and would probably only respond to any issue once it had already become an issue, i.e low fluid/oil levels.
His car had pretty much a new issue every week it would be hard for me to constantly name the problems it had, in the end he just got a new one.
I'm hoping to get my first car sometime in the next month and would like it to last for a long time and be well maintained, and was wondering if, in general, speeding (roughly 10-20mph above 70mph) would cause my car to die significantly quicker?