It is claimed that a small unit installed in the fuel tank can save fuel 20-30%. The basic principle is reducing loss of volatile compounds via negative charged air. I really doubt the principle.
(1) To my knowledge, high voltage or radioactive material are needed to ionize air, but neither of them is used.
(2) Even without this device, the loss of volatile compounds can be up to 20-30? It does not make sense to me.
But the result of our test shows that it seems working. For a same route, 19 Liter gasoline is needed without the device and 12 liter gasoline is needed with the device. This is only one test so there must be some uncertainties. But I am really curious will it really work and if it is worthwhile to test more?