Beave, What is the price per liter of diesel fuel in Brazil?
The price of 1 liter (1/4 gallon) of gas in Rio de Janeiro is R$ 4.46 as of 5/25/2018 (today) So that’s about $17.00 per gallon....
Looks like about $.98 per liter, which would be $3.71 per gallon.
I found no direct source, but calculated it from price per liter.
The price was from quotes on 5-21-18. And I’m sure the price will vary depending upon local transportation costs.