308 commerical timing change time

friends, hello everyone. my vehicle 308 2012 license auto 6th vehicle bought 90 thousand and while the former owner said the triger changed 80 thousand. but we did not see, of course there was no maintenance booklet. In short, I trusted the man's words. The tool now comes to 120 thousand. the timing change of the vehicles is a few thousandths. There is confusing information on the net.

If that km has changed, 2oo thousand new changes are made. If you say you are lying, take it and change it, it has a life of 120 thousand km. If they squeeze like oxen in a proper place, they break on the road for a month.

Thank you. I can change it in 120 thousand.