There are thousands of gadgets you can buy for your vehicle, but it’s hard to know which will be worth the money. Some car gadgets claim to improve fuel efficiency, while others make the undercarriage of your vehicle glow neon purple. If you’re looking for a car gadget that’s both practical and worth the cost, consider one of these car devices. GPS – No device has changed the way we drive in recent years quite like the GPS navigation system. Whether you use GPS navigation on your mobile phone, or as a stand-alone unit, this device can help you find...