On Friday, Tesla Motors announced a few new perks for customers who own its Tesla Model S electric sedan; and also made some changes to the terms of its service agreement.

Unveiling the new perks for the owners of Model S, Tesla CEO Elon Musk said - during the course of conference call with reporters on Friday - that customers who bring their electric sedans out for service will be offered loaner cars by Tesla. The loaner cars, as per Musk, would be the company's "best cars," featuring top-class features and accessories.

Noting that Tesla wants to ensure that the service loaner cars offered to customers are "newish" cars, Musk said that the automaker is not in favor of its loaner cars being "an aging fleet of overused cars," which some dealerships offer as loaner cars in some cases.

Another perk which Tesla announced for Model S owners is that the battery issues of the car will be covered by warranty. As such, any failure of the battery pack in the electric sedan for reasons other than deliberate abuse, will give owners of the car the advantage of a free replacement, for eight years.

Moreover, about the changes in the service contract, Musk said that Tesla was making the annual service agreement `optional' rather than the mandatory, as it has been thus far. About the decision to make the changes announced, Musk said that Tesla's "service is OK but not great and it needs to be great."