Asalamoelikum friends ,
I brought 18000 km driven suzuki mehran euro2 . previous owner was using Caltex havoline 20W-50 . I guess 20-50 grade is viscous , kindly suggest me which grade should i use. i personally like caltex havoline formula 10w-30 . Kindly guide me..
also tell me after how much km i should go for engine tuning ?
