is finished in a metallic, root beer-colored paint known as "turbine bronze". Its headlights, deeply-recessed taillights, turn signals, and pod-shaped backup lights are mounted in chrome bezels. The turbine-inspired style carries through to the center console design of the interior, which has bronze-colored leather upholstery, deep-pile bronze carpet, and brushed aluminum accents. The cars have black vinyl covered hardtop roofs, leather-upholstered bucket seats for front and rear passengers, and whitewall tires. The Turbine Car's dashboard is dominated by three large gauges: a speedometer, a tachometer, and pyrometer, the latter monitoring the temperature of the turbine inlet (the engine's hottest component). Its appearance is mostly stock, although the tachometer and pyrometer display abnormally high readings compared to piston-engine cars: 46,000 rpm and , respectively. All 55 turbine cars had identical ignition keys. User program Two of the cars gave rides to visitors at the 1964 New York World's Fair, and another went on a worldwide tour; 50 were lent to the general public as part of a user program. The cars were given to drivers for a three-month period at no charge, aside from fuel costs; participants also gave Chrysler in-depth interviews within two weeks of returning their cars. During the user program, which ran from October 1963 to January 1966, the cars' operational downtime was reduced from four percent early on to one percent by its conclusion. The user program helped identify a variety of problems with the cars, including starter malfunction at high altitudes, difficulty in mastering the unusual eight-step starting procedure (which, for some users, resulted in engine damage), and the cars' relatively unimpressive acceleration. Nonetheless, the turbine engines were remarkably durable in comparison to contemporary piston engines. The most-cited advantages of the turbine engine, according to the participants' interviews, were its smooth and vibration-free operation, reduced maintenance requirements, and ease of starting in different conditions; the most-common complaints concerned its slow acceleration, sub-par fuel economy, and relatively high noise level. Investigating the latter complaint, Chrysler found that the distinctive sound of the car's turbine (reminiscent of a jet engine) was positively received by about 60% of those involved in the user program and disliked by about 20% of their fellow users. The cars had conspicuous warning labels cautioning drivers to avoid using leaded gasoline; although the turbine engine could run using leaded fuel, it left debilitating deposits in the engine. This left Chrysler recommending against the very