i don't kill them tight :haha but i snug them up. they have a rubber o-ring so you don't have to tighten them that much. :thumbsupI heard that in some case when using a adjustable wrench the caps break??? So if you use one dont get too rammy with it
I am going to do my fuel filter today or tomorrow, I don't have big metric sockets but I am going to see if Standard will be a close fit.