# 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/2903>\
**Category:** Developer Discussion\
**Created:** [September 5, 2025, 2:06am UTC](https://community.fireblocks.com/t/using-custom-gas-vaults-in-gas-station-auto-fuel-issue-tron-support/2903 "2025-09-05T02:06:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dung.nguyen.trung](https://avatars.discourse-cdn.com/v4/letter/d/c68b51/32.png) [@dung.nguyen.trung](https://community.fireblocks.com/u/dung.nguyen.trung)\
**Post date:** [September 5, 2025, 2:06am UTC](https://community.fireblocks.com/t/using-custom-gas-vaults-in-gas-station-auto-fuel-issue-tron-support/2903/1 "2025-09-05T02:06:12Z")

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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**.

> ❓ **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!