PMS for 2017 Mitsubishi Strada

[6thgenaccord]

Hi, ask ko lang po kung normal ang prices na chinacharge saken ng mitsubishi, simula nung nag pms ako from 1,000km, 10,000km and 15,000km, kasi they notified me last time na yung magiging charge for the 20,000km pms ay aabot ng 20k plus kasi may ibang papalitan, I have no knowledge about car parts and repairs so i hope someone can help me, normal ba lahat ng charges nila and normal din ba na aabot ng 20k plus kapag 20,000km PMS? Thank you.