I have a Peugeot 207SW 2009 1.4 75 hp petrol engine 227000km with a manual transmission. I bought it as a used car and even tho it was working fine I still decided to change the spark plugs because I know that nobody has touched them for God knows how long. Previous spark plugs were NGK so I decided to buy those again. I bough 4 NGK - 6418 (BY480-BKR6E) Iridium spark plugs and mechanic changed them on March 19th 2025. Before the spark plug change my fuel economy was noticeably better. Whenever my fuel gauge was at the half by then I have driven 360km but now its showing 340km, it really bothers me.
when did you buy the car?
now its showing 340km
What is your actual economy (litres per 100km). Without knowing your tank size, this information tells me nothing.
