This video shows you how easy it is to change the oil on a 2007 Suzuki Boulevard S40. Remove the drain plug and drain the oil into a drain pan. Remove the engine side cover and pull the comb filter out. Make sure the the o ring is on inside the filter before installing the new filter. There is also an o ring that goes onto the cover before installing the cover. Bolt the cover back on. Install the drain plug. Put the funnel inside of the refill and add 2 liters of oil(refill is above the oil filter cover).