Dave exposes the ECO (Nitro) OBD2 Fuel Saver as a complete SCAM! Also known as the OptiFuel. They are supposed to talk to the car's ECU via the CAN bus on the OBD2 connector, but does it even do that? Or is this Homeopathy for cars? Bonus rant on Audiophile Audiophoolery! Forum: http://www.eevblog.com/forum/blog/eevblog-1181-car-eco-obd2-fuel-saver-scam/ Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3