Is a D6 virgin fuel oil offer real?
By the Vanguard Verify desk · Published 2026-10-25 · Updated 2026-10-25
Short answer: treat every "D6 virgin fuel oil" offer as unverified until you can confirm a real seller, a real product specification, a real storage tank and an independent inspection. "D6" and "virgin" are trade labels, not an official grade, so the offer must state a recognised standard and test method that an inspector can measure.
What D6 actually refers to
In the trade, "D6" is usually used to mean a heavy residual fuel oil similar to No. 6 fuel oil (Bunker C). The U.S. EPA describes Residual Fuel Oil No. 6 as a heavier fuel oil used for power generation, space heating, vessel bunkering and industrial purposes. Fuel oil grades including No. 6 are specified in ASTM D396. The word "virgin" has no defined meaning in that standard. Some sellers use it for straight-run product, others for reprocessed or blended material, so it cannot be relied on.
Steps to check the offer
- Ask for the full specification sheet with each parameter, limit and test method (density, viscosity, sulphur, flash point, pour point, water and sediment). A one-line spec or a spec that copies another product is a warning sign.
- Identify the seller and verify it in the official company registry of its country. Check the LEI on GLEIF if one is quoted. Confirm the signer is an officer of the company.
- Identify the tank. A real offer names the terminal, tank number and storage operator. Contact the terminal independently (contact details from its own website, not from the seller) to ask whether the seller holds product there. Terminals may not disclose client details, but they can usually say whether a document on their letterhead is genuine.
- Insist on independent inspection by a recognised inspector (SGS, Bureau Veritas, Intertek and similar) appointed and paid as agreed in the contract. Verify any existing report directly with the inspector that issued it. See how to verify an SGS report.
- Check the payment instrument. Bank-issued payment such as a documentary credit (DLC MT700) against shipping and inspection documents protects both sides. Be careful with procedures built around "tank-to-tank" transfers that require the buyer to pay before inspection.
- Test the price against published residual fuel benchmarks. A large discount to market with no clear reason is one of the warning signs described by the ICC Commercial Crime Services.
Red flags
- Seller asks for injection fees, tank storage fees or "TSR/TSA" charges paid upfront to the seller rather than to the terminal.
- Documents such as "dip test" or "ATV" (authority to verify) provided only as scans that cannot be confirmed with the terminal.
- Seller demands buyer POF, a bank comfort letter or an MT799 before providing any proof of product. The buyer gives POF; the seller gives POP.
- Huge monthly volumes from a company with no trading history or no registered address.
- Terminal names that you cannot find with an independent search, or documents with mismatched tank numbers.
Quick reference
| Claim in offer | How to check |
|---|---|
| "D6 virgin" grade | Ask for full spec against ASTM D396 or another named standard |
| Product in tank | Confirm directly with the named terminal |
| Quality report | Verify with the issuing inspector |
| Seller identity | Official registry and GLEIF |
For a similar check on diesel offers, see is an EN590 offer real.
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FAQ
Is D6 an official fuel grade?
No. D6 is a trade label usually used for heavy residual fuel oil similar to No. 6 fuel oil. Official specifications such as ASTM D396 describe grades including No. 6; insist that any offer states a recognised standard and test methods.
What does virgin mean in a fuel oil offer?
It has no defined meaning in the fuel oil standards. Rely on a measurable specification and an independent inspection report, not the word virgin.
Should I pay tank storage or injection fees to a seller?
Be very cautious. Storage charges are owed to the terminal under a contract with it; confirm any such arrangement directly with the terminal before paying anything.
Who provides proof of product?
The seller provides proof of product (POP); the buyer provides proof of funds (POF).
Vanguard Verify is run by Vanguard Trade Capital Goods Wholesalers DWC-LLC, Dubai South, Licence 14282. This answer is general information, not legal or financial advice.