I am saving a lot of money at the fuel pump again

My friend is always installing new things in his car, but his latest project is running water for gas System in his new car. I couldn’t believe it when he told me all about how the system actually works.  It’s basically a DIY and make fuel cell.  Apparently, it really can save you money at the fuel pump, but the only reason it never really taken off is because if you get things wrong.  It can literally blowing a range of up and can be quite dangerous.  However, if you know what you’re doing, you can save a lot of money at the fuel pump.