---
title: Flex-Fuel Vehicle Technology
type: technology
url: "https://www.envisioning.com/research/grid/brazil__flex-fuel-vehicle-technology"
hub: grid
summary: Engine control systems that seamlessly switch between any blend of gasoline and ethanol — invented in Brazil in 2003, now standard in 90%+ of new cars sold domestically
---

# Flex-Fuel Vehicle Technology

Engine control systems that seamlessly switch between any blend of gasoline and ethanol — invented in Brazil in 2003, now standard in 90%+ of new cars sold domestically
- Technology Readiness Level: 9/9
- Impact: 3/5
- Investment: 2/5
Flex-fuel technology uses sensors and adaptive engine management to optimize combustion for any ratio of gasoline and ethanol, from pure gasoline (E27 in Brazil) to pure ethanol (E100). The driver chooses at the pump based on price — typically switching to ethanol when it costs less than 70% of gasoline.

Volkswagen launched the first commercial flex-fuel car in Brazil in March 2003 (Gol 1.6 Total Flex). Within five years, flex-fuel vehicles dominated new car sales. By 2025, over 90% of light vehicles sold in Brazil are flex-fuel.

The technology is now evolving: Stellantis launched a flex-fuel hybrid in 2024, and Toyota is testing a flex-fuel hydrogen engine in Brazil. The country is pursuing a 'technology-neutral' approach to vehicle decarbonization — not betting solely on battery-electric but allowing ethanol, hybrid, and hydrogen pathways to compete.

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Source: Envisioning — Technology Research Institute (https://www.envisioning.com/research/grid/brazil__flex-fuel-vehicle-technology)