The HKS Turbo Timer Type-0 features a red LCD backlit display for easy visibility, 2 timer modes, and a battery voltage meter with a peak value indication and warning function. The HKS Turbo Timer to assist in cooling down the turbocharger to prevent oil coking in the center bearing cartridge assembly. Oil "coking" occurs when a turbocharger is not properly cooled down and the oil that normally lubricates the center cartridge heats up and forms solidified oil deposits. A turbo timer allows an engine to idle for a preset amount of time after the ignition key has been turned to the off position and removed. By allowing a turbocharged engine to idle, oil continues to pass through the turbo until it has cooled down to the point where oil "coking" will not occur.