Hi I put the car on ramps and changed the haldex filter and oil, the job was pretty easy, didn't lose much oil when I put the new plug and washer on. Torqued it up to 15nm as per the manual. Cleaned the area afterwards to look for leaks and noticed this New washer time? Has this happened to anyone before? Should I drop the oil and put in a known amount again seeing as I'll lose a bit more if I change the washer? Help?