# Fuel oil (NA1993) — Postal shipping restrictions by item category

For Fuel oil (NA1993), carrier is USPS; restriction type is restricted; scope is domestic mail via surface transportation; conditions is Mailable if qualifies as Limited Quantity surface material and meets quantity limitations and packaging requirements; Packaging Instruction 3A or 3B as applicable, recorded from its source on 2026-08-04.

- **Item category:** Fuel oil (NA1993)
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** domestic mail via surface transportation _(our reading, not quoted from the source)_
- **Conditions:** Mailable if qualifies as Limited Quantity surface material and meets quantity limitations and packaging requirements; Packaging Instruction 3A or 3B as applicable _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> Fuel Oil (NA1993): A flammable liquid with a typical flashpoint below 100° F (38° C) is mailable if it qualifies as a Limited Quantity surface material

## Source

- https://pe.usps.com/text/pub52/pub52c3_022.htm

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).