
Worked fantastic for 7 months then stopped working. TO UPDATE! I actually unplugged and plugged it in and it's working again. Looks like a reset is needed. It still works. My oil consumption in my 2008 Avalanche went from 1 1/2 liters per 4000 miles to 1/2 liter. with a mileage of 120,000 km. My Ave MPG dropped from 15.5 to 14.5 while using this device. I liked how it worked, smoother acceleration and braking. I will contact Range for a replacement.

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