# Using Custom Gas Vaults in Gas Station – Auto-Fuel Issue & Tron Support

**URL:** <https://community.fireblocks.com/t/using-custom-gas-vaults-in-gas-station-auto-fuel-issue-tron-support/2830>\
**Category:** Developer Discussion\
**Created:** [August 29, 2025, 3:36am UTC](https://community.fireblocks.com/t/using-custom-gas-vaults-in-gas-station-auto-fuel-issue-tron-support/2830 "2025-08-29T03:36:07Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![noreplyteacher](https://avatars.discourse-cdn.com/v4/letter/n/a4c791/32.png) [@noreplyteacher](https://community.fireblocks.com/u/noreplyteacher)\
**Post date:** [August 29, 2025, 3:36am UTC](https://community.fireblocks.com/t/using-custom-gas-vaults-in-gas-station-auto-fuel-issue-tron-support/2830/1 "2025-08-29T03:36:07Z")

</div>

Hi Fireblocks team & community,

I’m currently testing in **Sandbox** using the account registered under:  
**`dung.nguyen.trung+1@cozuchi.com`**

I ran into a few issues and questions:

* * *

### 1. **Auto-Fuel Not Working with Custom Gas Vaults**

I created **3 separate vaults** specifically for gas fees and replaced **all addresses** in the **Gas Station setting** with these custom vaults (instead of the default gas station addresses).

After this change, the **Auto-Fuel feature stopped working**.  
Previously, it worked fine when I used the default gas station addresses provided by Fireblocks.

> ❓ **Question** :  
> Am I allowed to use my own custom vaults as **Gas Station wallets** in both **Sandbox and Production**?  
> If yes, what is the correct procedure to make Auto-Fuel work with them?

* * *

### 2. **Tron Support in Gas Station**

I noticed that in the default gas station settings, **Tron is not listed** (I also know that Gas station only support EVM-base network) - Just want to confirm if have anything new

> ❓ **Question** :  
> Does **Production** currently support **Tron** for gas station auto-fueling?  
> If not, is it planned or is there any alternative workaround?

* * *

Thanks in advance for the support!

Best,  
Dung Nguyen

---

<div class="post-metadata">

**Author:** ![Rajalakshmi](https://avatars.discourse-cdn.com/v4/letter/r/8baadc/32.png) [@Rajalakshmi](https://community.fireblocks.com/u/Rajalakshmi)\
**Post date:** [September 3, 2025, 7:32am UTC](https://community.fireblocks.com/t/using-custom-gas-vaults-in-gas-station-auto-fuel-issue-tron-support/2830/2 "2025-09-03T07:32:21Z")

</div>

> [@noreplyteacher](#):
>
> [dung.nguyen.trung+1@cozuchi.com](mailto:dung.nguyen.trung+1@cozuchi.com)

Hi Nguyen,

Thanks for reaching out to us.

To answer your query 1, **Auto-Fuel Not Working with Custom Gas Vaults**

- On the sandbox, gas station v1 is only supported, where you cannot set a custom vault accout to pay your transaction gas fee.
- For the mainnet workspace, you can migrate with Gas Station V2, where you can designate one of your workspace vault accounts to be a gas station vault, from which the other vaults will be auto-fueled while the threshold is met.
- You could consider reading the guides on the gas station here,
  - [Gas station V1 setup](https://support.fireblocks.io/hc/en-us/articles/11084117251484-Set-Up-the-Gas-Station)
  - [Gas Station V2 setup](https://support.fireblocks.io/hc/en-us/articles/11602800877596-Setup-for-Gas-Station-2-0)

Query 2, **Tron Support in Gas Station**

- [Gas Station V2 supports Tron network](https://support.fireblocks.io/hc/en-us/articles/9378061609884-Default-Gas-Station-values#default-gas-station-values-0-1) in Mainnet workspace.

---

<div class="post-metadata">

**Author:** ![noreplyteacher](https://avatars.discourse-cdn.com/v4/letter/n/a4c791/32.png) [@noreplyteacher](https://community.fireblocks.com/u/noreplyteacher)\
**Post date:** [September 3, 2025, 9:39am UTC](https://community.fireblocks.com/t/using-custom-gas-vaults-in-gas-station-auto-fuel-issue-tron-support/2830/3 "2025-09-03T09:39:48Z")

</div>

Thanks a lot for your support @Rajalakshmi