The new Tesla Motors Showroom and Service Center, above and below, are at 530 Route 17 north in Paramus, the shopping capitol of the Northeast, near Paramus Park Mall. The Tesla gallery at New Jersey's biggest mall, Westfield Garden State Plaza in Paramus, will remain open. By VICTOR E. SASSON EDITOR Got juice? For owners of all-electric cars, the availability of juice or electricity is the key to their extended mobility. Now, Tesla Motors has opened a new showroom and service center on Route 17 in Paramus, where eight Superchargers are available 24 hours a day to Model S and Roadster owners. A 20-minute charge adds 170 miles to your range, and a full charge takes an hour. The cost? It's free. There's no charge to recharge. Get it? But the opening of the 20,000-square-foot building this month is also big news for prospective Tesla owners, because new cars will be delivered there. Until the Paramus service center opened, new owners had to travel to Springfield Township, so...