I realize my contribution may not comply with the intent of standard technology, however making an effort to help the world become less polluted is important... My 1994 Chevrolet Camaro came from the factory with estimated miles per gallon averaging 18mpg city and 24mpg highway. It now averages 32 mpg. They key is tuning the computer that controls fuel/air/spark through sensors on the vehicle (so I guess that is using technology)... Additionally, the performance of the vehicle has gone from 14.x seconds in the quarter mile at 98mph to 11.7 seconds in the quarter mile at 115mph. The combination of opening up the exhaust (retaining catalytic convers and smog controls), changing the gear ration for the rear end, replacing the stock 350 V8 with a stroked 383, lighter wheels and tires, changing the fully automatic transmission to a manual valve body automatic (needs to be shifted (but without a clutch)) has resulted in cleaner and greener performance but the real difference is in using the existing sensors to fine tune the computer that controls all motor functions.
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