Aoa Bro,
Kindly suggest me Spark Plugs for Xli 2006.Currently I am using the original stock one with odometer near 120K.
Still it is giving me 1st self start on CNG but causing lil delay on Petrol so thinking of replacement now.

1. Kindly suggest me good brands available in Karachi which would be compatible

2.also suggest me trust-able place or shop from where i can buy original brand by blind eye.(not the common fake ones)

3.Can i replace it with 2 tip or 4 tip?

4.what is the way of checking the right time for the replacement of spark plugs?