Tesla Motors has just revealed the latest edition of it 5-part announcement trilogy. Whereas the previous first installment had to do with the company's new leasing program, this episode is all about service and warranty, comes gift-wrapped in the glittery descriptor of "World's Best," and is accompanied by hints of a future battery upgrade.

The new plan improves on the California automaker's service program by adding a valet service that brings you a top-spec Model S Performance – or a Tesla Roadster, if you prefer – to temporarily replace your personal vehicle while it's being serviced. CEO Elon Musk states that this fleet of Model S service vehicles, which will initially number about 100, will ideally be less than three months old and also be available for immediate sale. Like your loaner more than your own car? You can keep it, paying "a price that is lower by 1% per month of age and $1 per mile" for your new ride and taking, likely, a similar hit on your trade-in.

Musk hinted that a 500-mile battery would not be an unreasonable thing to expect in four or five years.

Not only should the purchase scheme keep the loaner fleet nice and fresh, it may also create a cache of certified pre-owned inventory for buyers who are looking for a deal on a Tesla that starts at $69,900 from the factory, or who would rather not wait a couple months for a new, made-to-order car.

As well as no-travel hassle, Tesla has also made its $600 annual service optional without effecting the standard 5-year/50,000-mile warranty. The company has also made the battery portion of the warranty unconditional, meaning that, if you manage to somehow turn it into a useless brick (something that should be quite difficult to accomplish with the Model S), you will get a replacement unit of equal capacity free of charge.

Speaking of battery capacity, during the media call, Mr. Musk also offered some hope for those anxious for packs that hold more energy than the current EPA-estimated 265-mile/85 kilowatt-hour packs now available. In response to a question about upcoming technology improvements, he hinted that a 500-mile battery would not be an unreasonable thing to expect in four or five years. He then added that, eventually, Tesla would likely offer owners the opportunity to upgrade their vehicles with longer-range capabilities.

It all sounds pretty good to us, and we can't help but think if this upstart company keeps it up, surpassing sales of the Chevy Volt might seem a minor accomplishment. For more details on this newest warranty arrangement, you can get more details in a blog post on the Tesla website.