TWI - Data Archive & Latest TWI Figures

1. The TWI table has the upper and lower limits of 40 and 62. An increase of 22 points in the TWI represents a saving of 27.9% on the fuel cost. If fuel cost constitutes of 60% of operation cost this will be a saving of 16.74% on operations cost. This also means that the price differential in bunker fuels should have a spread of 27.9% based on the TWI.
2. The FuelTech instrument does not record ECN values less than 18.7 since the fuel is considered to have very poor Ignition and Combustion properties. Therefore, ECN values hit a plateau on the lower end. At the upper end they go upto 35 and rarely up to 45. Nevertheless, there is sufficient range from 18.7 - 35 to address this variation in Ignition and Combustion properties of the fuel.