So I picked up an oil filter and bottle of oil today so I can do an oil change before next weeks trackday.

Now I remember a time when oil filters always had a couple of copper washers in the box with it but for some reason they dont anymore.

Would anyone know off the top of their head what size washer you need for your sump plug? I grabbed a box with half inch washers but obviously it would be nice to know if they are somewhere like the right size BEFORE I let all the oil out

06 WRX if it makes a difference!