I have a Family Member that is at the recommended Mileage to replace spark plugs on an 06-11 Honda Civic 1.8 Non SI. I found the Honda labeled plugs at around $20 each at a discounted price over what a dealer would charge. Is it worth it spend that on these plugs ? I think it’s little spendy for plugs. I would buy once cry once if needed to make sure it runs right. I just don’t want to change them again for another 60-90 thousand miles as listed in the Honda Manual.