Effuel Review
Effuel is a chip that boosts driving efficiency. It plugs into your car’s OBDII interface. Also known as an EcoOBD2 plug, Effuel and similar devices claim to potentially save you hundreds of dollars per year on gas. Just plug Effuel into your car’s OBDII port (every car made since 1996 has one), then improve fuel efficiency by 15% to 35%.