New tools to extend car mileage. Garmin has a new EcoRoute HD cable that plugs into your cards onboard diagnostics port (OBD II) and communicated via Bluetooth to their GPS navigation units.  Fuel flow, in take, oil pressure, throttle position, etc are send to the GPS for analysis and display.  This data is used by their ecoRoute software. ecoRoute HD will be compatible with many current and future nüvi models, including 1260, 1370, 1390, 1490 and 1690.

Garmin has free ecoRoute software for some of their nuvi GPS navigation devices that adds a “less fuel” option as a routing preference. When selected, the Garmin nüvi GPS will determine if more fuel efficient routes exist based upon road speed data and vehicle acceleration data for a given route.

It is compatible with Garmin nuvi 205, 705, 1200, and 1300 series of GPS’s. Amazon has most of these models on sale.