When tests were conducted on gas saving chips the results were open to doubt. The age of the vehicle, size of the engine and levels of maintenance were the major aspects that affected the results. The results were warped to the extent that a hundred percent guarantee on the success of the gas saving chip could not be offered. To get a better idea of the outcome of the gas saving chips, have a look at the example. When the gas chip was used in a vehicle which has an engine capacity less than 1800cc, in comparison with a vehicle that did not have the chip installed the difference was negligible.