I follow the manufacturer's suggested interval of 8000km. The same car supposedly has a longer interval in Japan (16000km), but using a different engine and def

I follow the manufacturer's suggested interval of 8000km. The same car supposedly has a longer interval in Japan (16000km), but using a different engine and definitely different operating conditions. It's just not enough of a cost or hassle for me to bother deviating from the recommendations. I do happily ignore the oil change shop stickers that say it should be changed in 3 months/5000km.