unleaded

[/ʌnˈlɛdɪd/]
adjective, noun
sem chumbo
1. (adjective) Containing no lead, particularly referring to gasoline/petrol without lead additives
Most modern cars require unleaded gasoline.
A maioria dos carros modernos requer gasolina sem chumbo.
2. (noun) Unleaded gasoline or petrol as a fuel product
I need to fill up with unleaded at the gas station.
Preciso abastecer com gasolina sem chumbo no posto de combustível.
3. (adjective) Free from lead content or lead-based substances in general
Unleaded paint is safer for children's rooms.
Tinta sem chumbo é mais segura para quartos de crianças.
Unleaded gasoline became mandatory in the United States in the 1970s due to environmental and health concerns. In Brazil, lead-free gasoline (gasolina sem chumbo) has been standard since the 1990s. The term is primarily a practical, technical descriptor used at gas stations and in automotive contexts across both countries, with strong environmental associations.
Synonyms / Sinônimos
lead-freeunleaded petrolunleaded gasolineno-lead
Antonyms / Antônimos
leadedleaded gasolinelead-containing

Regional Variations

General Brazilian
gasolina sem chumbo
Most common term; widely used at fuel stations
Rio de Janeiro
gasolina comum ou premium sem chumbo
May specify the grade along with lead-free specification
São Paulo
sem chumbo
Short form commonly used; sometimes just 'gasolina sem chumbo'
Portugal
gasolina sem chumbo or sem-chumbo
Portuguese spelling uses 'chumbo'; term is mandatory at all fuel stations since 1989

Related Words

gasolinepetrolfueloctanecombustionemissions

Related Idioms & Phrases

Fill up with unleaded - abastecer com gasolina sem chumbo
Unleaded fuel standard - padrão de combustível sem chumbo
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