MTD Optima LG200H Mulching / After 2-Years

The tractor is nearing the end of its warranty! I haven't had any problems with it yet, I change the engine oil every year (Motul 10W30 Garden). I have sharpened the knives twice, and regularly lubricate and clean all moving parts of the machine. In the winter, I took out the traction system from the tractor, and I disassembled and lubricated everything. It has 40 engine hours.