Germany's filling stations could gain a new grade — E20 — if Brussels finishes burying the 2035 combustion-engine phase-out, Heise reports. The logic is uncomfortable for everyone involved: if new petrol and diesel cars are allowed to keep being sold, the cheapest way to keep counting their emissions down is to change what goes into the tank.
E20 means 20 percent ethanol by volume, double the E10 that has stood at German pumps since 2011. On paper it is the obvious lever. A litre of E20 carries less fossil carbon than a litre of E10, and the biofuel share is counted as renewable under EU rules — so a manufacturer or a member state chasing a CO2 target can book the improvement without touching the engine, the exhaust after-treatment or the price of the car.
The physical catch is the fleet. E10's arrival in Germany in 2011 was a consumer revolt dressed up as a technical argument — the windscreen stickers reading 'E10 nicht tanken' — and the underlying worry was not stupid. Ethanol is hygroscopic, it attacks some elastomers and aluminium components, and it carries roughly a third less energy per litre than petrol, so a richer blend means slightly more fuel burned for the same distance. Most cars built since around 2010 are explicitly approved for E10. Far fewer are approved for E20.
That gap is where the politics live. A fuel standard is retroactive legislation aimed at machines already sold. Germany's fleet is old by Western European standards, and the drivers least able to buy a new car are precisely the ones who would face either a misfuelling risk or a pump with nothing they can legally use. The 2011 experience suggests what happens next: forecourt chaos, insurance disputes over who pays for a swollen fuel system, and a political price paid by whoever signed the order.
Small engines are the other tripwire. Chainsaws, lawnmowers, outboard motors and generators are approved for far lower ethanol shares, and they are typically owned by people with no interest in the CO2 accounting that motivated the change. E20 at a shared pump nozzle does not discriminate between a 2024 direct-injection engine and a 1998 two-stroke.
Brazil is the reference case advocates will cite, and it is a real one: mandatory blends have run far above 20 percent for decades, with flex-fuel engines designed for exactly that and a cane-ethanol supply chain built around it. Europe has neither the engine fleet nor the feedstock base. Importing the blend without the fleet gets you the paperwork, not the decarbonisation.
The quiet fight is over accounting. Crop-based biofuels count toward renewable targets only up to a cap, and the indirect land-use change debate — whether growing fuel displaces food or forest elsewhere — has never been settled, only parked. Raising the blend raises the volume of biofuel that needs to be certified, imported and defended, at a moment when the EU's own sustainability criteria for the feedstock are under pressure.
And there is a strategic irony worth naming. The combustion ban was weakened partly on the argument that e-fuels would let engines survive. E20 is a different bet entirely: not synthetic fuel for the few, but doubled crop-based blending for the many. It is the pragmatic version of the same retreat, and it will be attacked from both directions — by those who think it greenwashes, and by those who think it is a tax on drivers dressed as climate policy.
What to watch: whether E20 arrives as a new pump grade drivers can choose, or as a blending mandate that reaches every litre without a word on the nozzle; the Commission's revision timetable; and whether the compatibility list is published before the fuel, rather than after.
