Below are photos of the B3 Cell Kit installed on a 1997 BMW Z3, 6 cyl, 2.8 L engine. Used to get approx. 20MPG not gets approx. 25 MPG. on every fill up. 25% better mileage. More HP! HHO booster is running all the time, at approx. 10 to 15 amps. Now use the cheaper gas due to the 120 octane hydroxy gas added, can't tell the difference between premium fuel and the regular grade?