Buying less gas at the pump

Water 4 Gas I had a 76 Buick Limited with huge engine in it that got 11 mpg in town and only 12 on the highway.
After putting a water 4 gas system on it, the simplest one, the mileage jumped to 16 in town and 17 on the highway. I know it works.
On my newer 2003 Buick, highway mileage jumped from 27 to 36 using a water-moisturizer system, like a rainy day. Have to have a mechanic friend help you get it done, but the system if fascinating and it works.
Click on the above link or here for more details.