Diesel AFR methodology
| Engine size (cc) | Mean MPG | Fuel price (per litre) | Fuel price (per gallon) | Rate per mile | Advisory fuel rate |
|---|---|---|---|---|---|
| Up to 1600 | 56.7 | 160.4 pence | 729.1 pence | 12.9 pence | 13 pence |
| 1601 to 2000 | 48.0 | 160.4 pence | 729.1 pence | 15.2 pence | 15 pence |
| Over 2000 | 36.3 | 160.4 pence | 729.1 pence | 20.1 pence | 20 pence |
Petrol AFR methodology
| Engine size (cc) | Mean MPG | Fuel price (per litre) | Fuel price (per gallon) | Rate per mile | Advisory fuel rate |
|---|---|---|---|---|---|
| Up to 1400 | 49.5 | 152.4 pence | 692.8 pence | 14.0 pence | 14 pence |
| 1401 to 2000 | 42.1 | 152.4 pence | 692.8 pence | 16.5 pence | 16 pence |
| Over 2000 | 26.7 | 152.4 pence | 692.8 pence | 26.0 pence | 26 pence |
LPG AFR methodology
| Engine size (cc) | Mean MPG | Fuel price (per litre) | Fuel price (per gallon) | Rate per mile | Advisory fuel rate |
|---|---|---|---|---|---|
| Up to 1400 | 39.6 | 86.7 pence | 394.1 pence | 10.0 pence | 10 pence |
| 1401 to 2000 | 33.7 | 86.7 pence | 394.1 pence | 11.7 pence | 12 pence |
| Over 2000 | 21.3 | 86.7 pence | 394.1 pence | 18.5 pence | 18 pence |
