I do not know of any sites, but with regard to Colombian fuel prices, here on the Caribe coast at least, they are as follows;
ACPM (apparently a form of inferior diesel) - COP 6380 ($3.30)
Extra - COP 8890 ($4.60)
Corriente - COP 8030 ($4.15)
A litre of oil is about the same price as a gallon of corriente.
As one gets closer to the Venezuelan border, the fuel gets cheaper, and usually, better.
How much does a man live, after all?
Does he live a thousand days, or one only?
For a week, or several centuries?
How long does a man spend dying?
What does it mean to say “forever”? - Pablo Neruda