We have developed a better filtration system and filter design for our 100 Series Riding Lawn Tractors 1. What do you mean, I will never have to drain oil from my engine again? How is that possible? The answer is simple. In fact, this System increases the amount of oil in the engine by nearly 40%. Here’s why: The new System captures contaminants and recharges your engine with nearly a quart (0.8qt) (0.76 l) of new oil.