When I purchase a new Lexus, the option to buy extended warranty(VSA) starting date is from the date of purchase VSA or by the end of factory warrant (4 years) expires? It doesn't make sense if the starting date is from purchase date because it basically overlaps extended warranty with factory warranty. It should be purchased close to 4 years when factory warranty is about to end. What is the benefit of purchase extended warranty on the same date you purchase new car?