Review on 🚗 Innovative Performance Chip/Power Programmer for Nissan NV200, NV350 Urvan, NV1500, NV2500 & NV3500 - Compatible with 2.0L, 2.5L, 4.0L, and 5.6L Engines - Enhance Fuel Efficiency, Save Gas, Boost MPG, Amplify Horsepower & Torque! by Marcus Munoz

I think this product is rubbish, I followed the instructions and all it seems to do is trick your car's computer into thinking it's increasing mileage when it really isn't so is. Simply disconnecting the battery will reset the computer, but after, say, 10 starts or 3 fill-ups, fuel efficiency will return to previous levels. If you want to see big numbers (your range), just disconnect and reconnect the battery. I did this while working on something else and found my range back to 480 miles when I first plugged it in. and within 10 starts or 3 fills. The range continues to decrease.