art
barrel
black
business
can
car
chemical
container
crude
design
diesel
drop
drum
element
energy
environment
ethanol
exchange
fossil
fuel
gallon
gas
gasoline
icon
illustration
industry
isolated
line
liquid
logo
lubricant
market
metal
money
natural
oil
outline
petrol
petroleum
pollution
power
sign
steel
symbol
tank
technology
thin
trade