# Do the FFI pills give you better mileage

**URL:** <https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918>\
**Category:** Maintenance/Repairs\
**Created:** [November 6, 2007, 1:34am UTC](https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918 "2007-11-06T01:34:43Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![gregg\_riehle](https://avatars.discourse-cdn.com/v4/letter/g/76d3ee/32.png) [@gregg\_riehle](https://community.cartalk.com/u/gregg_riehle)\
**Post date:** [November 6, 2007, 1:34am UTC](https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918/1 "2007-11-06T01:34:43Z")

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will these pills hurt the engin and do they work.

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [November 6, 2007, 2:31am UTC](https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918/2 "2007-11-06T02:31:48Z")

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No and no.

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**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\
**Post date:** [November 6, 2007, 4:47am UTC](https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918/3 "2007-11-06T04:47:46Z")

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And also, no.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [November 6, 2007, 11:32am UTC](https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918/4 "2007-11-06T11:32:26Z")

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No, they will not hurt the engin (or the engine). They will not work for you in terms of improving gas mileage, but they definitely work in terms of enriching the charlatan who is marketing them to gullible consumers.

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**Author:** ![SteveF](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevef/32/2_2.png) [@SteveF](https://community.cartalk.com/u/SteveF)\
**Post date:** [November 6, 2007, 1:51pm UTC](https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918/5 "2007-11-06T13:51:41Z")

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Whatever they’re supposed to do… they don’t.

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [November 6, 2007, 5:26pm UTC](https://community.cartalk.com/t/do-the-ffi-pills-give-you-better-mileage/6918/6 "2007-11-06T17:26:22Z")

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When asking a question of this nature, it’s generally good to provide us with a link so we can see what you’re talking about.

Whatever they are, they definitely can improve mileage. Balance one on the edge of your dash and drive such that it never falls off. But don’t put them in your tank. They’ll not help there.