Chemicals, Refined Products, Aromatics, Gasoline
April 02, 2026
Platts to launch new gasoline blend value calculations
Platts, part of S&P Global Energy, will launch new gasoline blend value calculations, effective from May 1.
Platts first proposed the launch of these new calculations on Feb. 24, 2026, in a subscriber note available here.
These calculations will represent the theoretical blend value of alkylate, raffinate, reformate, mixed xylenes, toluene and MTBE for use as gasoline blendstocks, utilizing an industry-standard formula.
These values will be calculated on a daily basis and appear on PGF0760, PGF0761, North American Crude and Products Scan, Europe and Americas Petrochemicalscan, Platts Core and in the Platts Price Point Database.
The inputs for the formula will include the following Platts symbols:
| Assessment Name | Incoterm | Location | Currency | UOM | Symbol |
| Gasoline CBOB 87 USGC Houston prompt pipeline | FOB | Houston | USC | Gallon | AARQU00 |
| Gasoline CBOB 93 USGC Houston Prompt Pipeline | FOB | Houston | USC | Gallon | AARQV00 |
| Gasoline CBOB 87 USGC Houston Prompt Pipeline RVP | N/A | Houston | N/A | psi | AARQURV |
| Gasoline RBOB 93 USGC Houston Prompt Pipeline RVP | N/A | Houston | N/A | psi | AARQVRV |
| Butane Enterprise Mt Belvieu Mo01 | DAP | Mont Belvieu | USC | Gallon | PMAAI00 |
And include the following octane and RVP values for each blending component:
| Blending component | Octane i | RVP i |
| Alkylate | 92 | 5 |
| Raffinate | 60 | 4 |
| Reformate | 100 | 1 |
| MTBE | 111 | 8 |
| Toluene | 105 | 1.5 |
| Mixed xylenes | 106 | 1.75 |
The formula for the outright value that the calculation will be based on will be as follows:
Where rBOB represents regular Gasoline CBOB 87 USGC Houston prompt pipeline and pBOB represents premium Gasoline CBOB 93 USGC Houston Prompt Pipeline.
A summary of the new symbols are here:
| Name | Daily Symbol | Weekly Average Symbol | Monthly Average Symbol |
| Alkylate blend value | ALKAB00 | ALKAB04 | ALKBA03 |
| Raffinate blend value | ALKRB00 | ALKRB04 | ALKRB03 |
| Reformate blend value | ALKRF00 | ALKRF04 | ALKRF03 |
| MTBE blend value | ALKMT00 | ALKMT04 | ALKMT03 |
| Toluene blend value | ALKTB00 | ALKTB04 | ALKTB03 |
| Mixed xylenes blend value | ALKMX00 | ALKMX04 | ALKMX03 |
Platts will also amend the existing gasoline blend value calculations that are given as a differential for alkylate, raffinate, reformate, mixed xylenes, toluene and MTBE for use as gasoline blendstocks, to clarify the underlying approach and improve transparency.
The calculations will reflect a value as a differential to the front-month NYMEX RBOB price, in line with observed trading practices in these markets.
The front-month NYMEX RBOB settlement (AARS001) will be subtracted from the outright blend value calculated by the formula above, in order to give a blend value as a differential.
The symbols to be amended are as follows:
| Symbol | Current name | New name | Weekly Average Symbol | Monthly Average Symbol |
| AASFE00 | Alkylate blend value | Alkylate blend value vs NYMEX RBOB | AASFE04 | AASFE03 |
| AATAS00 | Raffinate blend value | Raffinate blend value vs NYMEX RBOB | AATAS04 | AATAS03 |
| AASFG00 | Reformate blend value | Reformate blend value vs NYMEX RBOB | AASFG04 | AASFG03 |
| AATAR00 | MTBE blend value | MTBE blend value vs NYMEX RBOB | AATAR04 | AATAR03 |
| AASFI00 | Toluene blend value | Toluene blend value vs NYMEX RBOB | AASFI04 | AASFI03 |
| AASFH00 | Mixed xylenes blend value | Mixed xylenes blend value vs NYMEX RBOB | AASFH04 | AASFH03 |
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