i want to discuss two thing if any person can guide or give good advise
1 . my car is 51000 km driven ,i am using 5 w 20 of zic in it now my question do i need to change its grade as it is 51 k driven ?
2 recently i change its ac filter with guard ac filter and feel like its throw is decrease after changing its filter
do i need to change its filter if yes then which one is recommended ?