BMW and Toyota just launched a six-month pilot program in Spain that could completely rewrite the future of the internal combustion engine. They aren’t building a new electric battery concept. They are running a fleet of existing, gas-powered cars exclusively on a 100% renewable synthetic fuel.
The goal is simple but incredibly ambitious. They want to prove to European regulators that we can drastically cut vehicle emissions without forcing everyone to buy an electric car. If this works, it establishes a genuine lifeline for millions of traditional vehicles currently on the road.
The Renewable Fuel Test Fleet
This project is a four-way collaboration. Toyota Motor Europe and BMW Group teamed up with Spanish energy giant Repsol and technology supplier Bosch. They deployed a fleet of 20 vehicles this July to test this real-world application on the streets of Spain.
The cars run purely on Repsol’s “Nexa 95.” This is a completely renewable drop-in gasoline made entirely from sustainable feedstocks. To prove the environmental math actually holds up to scrutiny, Bosch integrated its Digital Fuel Twin tracking system. The software electronically monitors fuel consumption and verifies the exact emissions reductions across the entire lifecycle of the fuel.
The timing here is extremely deliberate. European Union lawmakers are currently locked in a fierce debate regarding a proposed 2035 ban on new combustion engine vehicles. Automakers are scrambling to find viable decarbonization alternatives to strict EV mandates, especially with global supply chains under heavy strain.
Why Automakers Need a VEEF Loophole Before 2035
BMW and Toyota are fighting for a regulatory concept called “technology neutrality.” They want the EU to legally recognize “Vehicles running Exclusively on Eligible Fuels” (VEEF) as a valid way to meet the aggressive climate goals set for the next decade.
If regulators accept Bosch’s digital tracking data at the end of this six-month trial, it means car companies won’t have to retool their entire factory lines for pure electric vehicles right away. They can keep producing and selling familiar, gas-powered engines, knowing the synthetic fuel itself is doing the heavy lifting for the environment. It provides a highly practical bridge for the industry, allowing current infrastructure to support future sustainability targets.