Besides being the most radical-looking shift knob on the planet, the Gaslock Indy Cater has an energy-saving function. It tells you the exact point to shift to save gas, and if you follow its timely shifting tips, you can end up spending 15% less on fuel. It's not going to give you astonishing mileage like that 200 mpg Velozzi hybrid we showed you yesterday, but still, 15% savings might come in handy.

Its auto-dimming LEDs adjust to ambient light so they won't be too distracting, and the shifter also has a helpful numerical indicator that reminds you what gear you're currently using. It's not only a super-cool addition to your car's interior, but the company says it's easy to install. See more close-ups of the Indy Cater on the next page.

It's yet another clever application of LED technology, lighting up your car's decor while saving energy in a unique way. — Charlie White

Gaslock, via Autoblog