The main difference between my car and me — aside from the alarming fact that my fluids need to be changed twice a night — is that I don’t come with an extended warranty. But I am expecting to get a phone call about the coverage on my brand-new vehicle any minute now. That’s because the last time I bought a car, a couple of years ago on a trade-in, I got a call from a warranty salesperson — this is absolutely true — the DAY AFTER I drove the vehicle home. Here is roughly how the conversation went. Me: “Hello?” Salesperson: “We’ve been trying to reach you about your car’s extended warranty.” Me…