inputs.text: quite pleased - bought product hunchi stumbled across looking ways improve fuel economy crosscountry drive since great experiences quantum energy related productsi figured worth shot installed ran car park minutes notice much vibration noise coming engine soon turned car threw product hose restarted car surprise still calm quiet ever rehemehembered drove coast day whole ride noticeably peaceful friends agreed felt incredibly calm relaxed two hour drive improved fuel economy far tell yes measured 34 last full tank installation since applied getting 3638 cannot say product alone also recently tires rotated oil changed attribute difference overall satisfied product mostly feel like driving bubble calm serene bliss rest traffic seehems chaotic not underestimate potential product