Checked against the Marketing Discipline Guidelines 2024 (Ver. 1, effective 24.10.2024) on 31 October 2026. Published by MDG Services on 31 October 2026.
Check one density number against the ranges MDG 2024 lists MDG 7.6 and, if you type it, against the invoice MDG 1.2(iv).
Check your density
A helper only. The printed ASTM Table 53B, or the figure your oil company works out, decides.
How to use it
- Pick the fuel. For diesel, pick up to B7 or the B8–B20 blend; if you are not sure, ask your oil company.
- Type the density you read. If it came from a hydrometer at a temperature other than 15°C, type that temperature too.
- To compare with the invoice, type its 15°C density. Press the button.
Common numbers people ask about
These are taken as densities at 15°C. The tables show only whether a number is inside the range MDG 7.6. MDG calls no number inside a range better than another.
| Diesel density at 15°C | Up to B7 (810–845) | B8–B20 blend (820–860) |
|---|---|---|
| 815 | Inside | Outside |
| 818 | Inside | Outside |
| 821 | Inside | Inside |
| 824 | Inside | Inside |
| 828 | Inside | Inside |
| 832 | Inside | Inside |
| 840 | Inside | Inside |
| 850 | Outside | Inside |
| Petrol density at 15°C | Petrol (720–775) |
|---|---|
| 742 | Inside |
| 745 | Inside |
| 748 | Inside |
| 750 | Inside |
| 755 | Inside |
| 760 | Inside |
| 770 | Inside |
| 780 | Outside |
A number read at 30°C is not the 15°C figure
Warm fuel reads lower on the hydrometer, so convert before you compare MDG 1.2(iv). For example (made-up samples, worked with the 15°C calculator):
| Fuel | Hydrometer reads | Sample temperature | Density at 15°C | Against the range |
|---|---|---|---|---|
| Diesel | 818.0 | 30°C | 828.5 | Inside |
| Petrol | 742.0 | 35°C | 759.7 | Inside |
| Petrol | 760.0 | 35°C | 776.5 | Outside |
What the checker uses
The ranges are petrol 720–775, diesel up to B7 810–845 and B8–B20 blends 820–860 kg/m³ at 15°C MDG 7.6, and the invoice limit is ±3.0 kg/m³ MDG 1.2(iv). The conversion is the ASTM Table 53B working of the 15°C calculator. More on each fuel: petrol density, diesel density and the density range.
A footnote to the 810–845 diesel range says a relaxation for fuel from Assam crude may follow Government notices. MDG prints no relaxed figure, and the checker applies none: ask your oil company MDG 7.6.
General practice, not an MDG rule: if a number is outside, read the hydrometer and the thermometer again. For a tanker you still doubt, MDG says to contact the supply location or the area field officer MDG 1.2(ix).
Note: a helper only. Every dealer must hold the printed ASTM table MDG 1.5(vi), and where it differs from the checker, the table decides MDG 1.2(iv).
Questions dealers ask
01Is diesel density 821, 824, 825 or 828 good or bad?
All four are inside both diesel ranges, 810–845 and 820–860, when they are the 15°C figure MDG 7.6. MDG ranks no figure inside a range above another.
02Is petrol density 748 or 750 good or bad?
Both are inside the petrol range, 720–775 kg/m³ at 15°C MDG 7.6. Neither is better or worse under MDG; for a tanker, the test is a match with the invoice within ±3.0 MDG 1.2(iv).
03Is petrol density 742 or 760 okay?
Both are inside 720–775 as 15°C figures MDG 7.6. If a reading came from a warm sample, convert it first: 760.0 read at 35°C is 776.5 at 15°C, which is outside.
04How do I know if my diesel density is good?
Type it with the fuel and, if it was not read at 15°C, the temperature. Inside 810–845 (820–860 for B8–B20 blends) meets the range MDG 7.6; for a tanker, match the invoice within ±3.0 MDG 1.2(iv).
05Which diesel range do I pick, up to B7 or B8–B20?
MDG lists both ranges but does not say which one your supply falls under MDG 7.6. Ask your oil company.
06Does the checker save or send what I type?
No. The check is worked out on your own phone or computer, and nothing you type is stored or sent.
Read the official text: Marketing Discipline Guidelines 2024 (PDF on Bharat Petroleum's website) (also published on iocl.com).
Related pages
About Dealer Kavach (advertisement)
Dealer Kavach is an app from MDG Services that tracks your outlet's filings, renewals, inspections and daily reports, and reminds you before deadlines, in Hindi and English.