# Mazda M-V ATF

**URL:** <https://community.cartalk.com/t/mazda-m-v-atf/59085>\
**Category:** Maintenance/Repairs\
**Tags:** mazda3, transmissions, mazda\
**Created:** [December 23, 2010, 1:38pm UTC](https://community.cartalk.com/t/mazda-m-v-atf/59085 "2010-12-23T13:38:41Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Feasle](https://avatars.discourse-cdn.com/v4/letter/f/3ec8ea/32.png) [@Feasle](https://community.cartalk.com/u/Feasle)\
**Post date:** [December 23, 2010, 1:38pm UTC](https://community.cartalk.com/t/mazda-m-v-atf/59085/1 "2010-12-23T13:38:41Z")

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Here’s the problem. The owners manual for my 09 Mazda 3i touring (4spd auto) says that I’m supposed to use Mazda M-V transmission fluid. This is NOT the same as Mercon V according to some people but it is the same as ford FNR5 which is compatible with Mercon V. My dealer says Mercon V is fine, some other dealers don’t. What I’d really like to put in is Mobil 1 synthetic. Mobil 1 synthetic says it’s compatible with Mercon V but doesn’t say anything about Ford FNR5 or Mazda M-V. Any ATF specialists here can help me untangle this.

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**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\
**Post date:** [December 23, 2010, 2:07pm UTC](https://community.cartalk.com/t/mazda-m-v-atf/59085/2 "2010-12-23T14:07:26Z")

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Don’t mess with transmission fluid…If it doesn’t say it’s compatible with you vehicle then DON’T use it.

BTW…most of these special ATF’s ARE synthetic fluids anyways…so don’t switch to Mobil 1 because it’s a synthetic…

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**Author:** ![Feasle](https://avatars.discourse-cdn.com/v4/letter/f/3ec8ea/32.png) [@Feasle](https://community.cartalk.com/u/Feasle)\
**Post date:** [December 23, 2010, 2:37pm UTC](https://community.cartalk.com/t/mazda-m-v-atf/59085/3 "2010-12-23T14:37:07Z")

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What should I do then since my local dealer, the only one in my town, is the one who told me that they use Mercon V not Mazda M-V?

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [December 23, 2010, 3:58pm UTC](https://community.cartalk.com/t/mazda-m-v-atf/59085/4 "2010-12-23T15:58:17Z")

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Here is a Mazda TSB about it. I have no idea whether this one has been superseded by a later one, but perhaps you should ask your local dealer if they are familiar with this TSB. Its main purpose is to tell you not to use Mercon V where M-V is called for.

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**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\
**Post date:** [December 23, 2010, 4:08pm UTC](https://community.cartalk.com/t/mazda-m-v-atf/59085/5 "2010-12-23T16:08:35Z")

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The dealer didn’t design or build that car. Trust what the manual says.