maybe a stupid question but are spark plugs interchangable between engines?
i had a 91 civic with a d15 but it got scrapped and a day before i bought these really good spark plugs for it.
now i have a DA with a b18. will the spark plugs for the D work in the B?.

 

you can interchange them but its not a good idea for the long run. get proper plugs for proper temp and gapping

 

check with you local auto parts