Thanks for your input, almost 10 days ago car started missing for sometime, at that moment petrol was also on reserve so not sure if it was cuz of plugs or inferior petrol petrol. I got the plugs cleaned that day and after that it was ok. Consumption is also okish with 9-10 kms a litre with AC. Today i got these changed but was just curious if plug condition tells something.So overall it says engine condition isn't that bad?