Negative is the way too be safe. remember the old Cadilac V-8-6-4? POS but sold it for 2 years to get their money out of the R&D money spent. Everyone is selling mystery items that promise increased gas mileage, 100% return on your investment, etc I like to do my part to help the buyer of this stuff not make mistakes. I doubt I would like the car to do the driving. I doubt whether politicians would do away with DUI for this. I have seen people get a DUI on horses, riding mowers and bicycles all to increase money going to politicians to spend to buy votes by giving it away to special interests.