Five push mowers and a lawn tractor last weekend. 3.5 HP Briggs Classic, 5 HP Briggs Quantum, 6.5 HP Briggs Quantum, 6.75 Briggs Quantum, Honda GCV 160, and Kohler Courage 20. All received Motomaster (Canadian Tire) Synthetic 10W-30, and Kohler got genuine Kohler oil filter. I'm the guy who...