No Blend Wall

Advanced biofuels blending:

  • can take place with fossil fuels at any concentration - immediately and for all engines.
  • can occur where costs are lowest, such as at refineries or coastal terminals.
  • is an economical choice for customers and society as a whole.
  • helps significantly reduce emissions, even at low blending ratios.

Unlike traditional biofuels, high-quality advanced biofuels have no "blend walls", or in other words, no blending limitations. Simply put, this means that almost any amount of advanced biofuels can be added to diesel – whereas most engines tolerate only ten per cent of ethanol in gasoline, or seven per cent of traditional biodiesel.

Why does this matter?

High concentrations of biofuels means high CO2 savings compared to fossil fuels. It also means cleaner air, as high-quality advanced biofuels reduce harmful emissions, such as small particles, from the tailpipe.

NExBTL renewable diesel behaves exactly like fossil diesel, but without the high emissions

For consumers, high-quality advanced biofuels means worry-free filling at the pump, as there is no need to be concerned about maximum concentrations of traditional biofuels and their possible effects on the engine

Neste trialled its NExBTL renewable diesel in 300 buses of 17 different types in Helsinki over a period of three years, some using a 30% blend, and some using 100% renewable diesel. Buses running on 100% renewable diesel did not experience any problems with their engines, even when temperatures dropped to -25oC, and the average reduction of local emission particulates was as high as 30%.


Blending walls and EU Policy

Given the huge potential of high-quality advanced biofuels can play in the future energy mix, Neste calls for a European policy which promotes high-quality advanced biofuels.

In its strategy "Alternative Fuels for Europe", the European Commission rightly recognised the qualities of HVO in terms of high concentration blending . It also noted that in aviation advanced biofuels are the only low-CO2 option substituting kerosene.

Neste supports European Commission's thinking, and calls for policy that promotes high-quality advanced biofuels through targets in national implementation plans of the Alternative Fuels strategy, along with other alternatives.