# Gas mileage **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [June 19, 2008, 2:42am UTC](https://community.cartalk.com/t/gas-mileage/15543 "2008-06-19T02:42:41Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![armchairmechanic](https://avatars.discourse-cdn.com/v4/letter/a/c5a1d2/32.png) [@armchairmechanic](https://community.cartalk.com/u/armchairmechanic)\ **Post date:** [June 19, 2008, 2:42am UTC](https://community.cartalk.com/t/gas-mileage/15543/1 "2008-06-19T02:42:41Z")
does that “water 4 gas” thing actually work? I know a guy who installed it to his truck and he says he thinks he’s getting better mileage but I’m skeptical. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [June 19, 2008, 3:19am UTC](https://community.cartalk.com/t/gas-mileage/15543/2 "2008-06-19T03:19:57Z")
Which type of magic does his device produce, hydrogen or steam? “I know a guy who installed it to his truck and he says he thinks he’s getting better mileage”…With scientific proof like that, how can you go wrong?? ---
**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\ **Post date:** [June 19, 2008, 11:49am UTC](https://community.cartalk.com/t/gas-mileage/15543/3 "2008-06-19T11:49:51Z")
In a word no. There are several people a day asking about these SCAMS. For it to work it would need to violate the Conservation of energy law of thermodynamics, which has never been done. Mother Nature is very good at enforcing her laws. Everyone would like better mileage just as everyone would like to win the lottery which is why you get all that e-mail and notices that you won the Nigeria lottery.