My Gli 2016 110,000Km
I was using Zic 10w-40 working Fine.
But this time Mechanic said its Summer and your car have run above 100,000 so you have to use 20w-50 grade, i have driven 20w-50 grade 2500 km but I’m not satisfied.Average is droped from 13-14 to 9-10 and pick is also not good this time.
Should I return to 10w-40??