I have had the 85/15 mix in my Prius years ago. I got over 65 miles to the gallon and I have the receipt to prove it. I got the municipality to test the fuel in 6 vehicles over a 6 month period. The results were outstanding. I have met with Ron on a few occasions. I don't do as much DD as some here but I know folks that do. But God forbid if I pass that along.