Can i drive my civic ext 2018 on s ehich mean sport or what ever it means every time or does it damage the engine or car if i put it on s?
Sure, Jack, go ahead. You won't hurt anything by doing so except your fuel economy.
Does it damage the car for a mile or two? Not enough to notice. After 100,000 miles you might notice damage. Drive how you want. Why you would choose to drive in the way you desire is entirely your choice. After a few months you will probably not use this feature ALL THE TIME.
Seriously? Maybe next they'll put an auto destruct button on the dash just to make sure you destroy your motor the proper way!
I don't care how you drive it and you don't need my permission either way.
Sure, carry on. Just don't ask me to pay your fuel bill.