Hey Everybody: I purchased a new 36 inch Toro T-Bar Walkbehind. The manual says to change the oil after first 8 hours but makes no mention of changing the oil filter. It says change the oil filter when you get 200 hours. I called Toro and they said only change the oil after the first 8 hours and do not change the oil filter. Need your thoughts. I always thought you change the oil and oil filter at the same time like on cars.