Fill the new filter about halfway full with clean, new oil.

Make sure when you add the rest of the oil (Step 20) that you take into account the oil added to the filter. There should be 4.5 liters total.

Don't worry if a little oil misses the hole; you'll use it to lubricate the filter.

Use your finger to apply some of the excess oil evenly around the rubber O-ring. If you didn't spill any oil, dip your finger into the new container of oil instead.