I usually rent a car and when I get back to the airport I usually fill it b up at the Pacific Estacion because it is near teh rental car return. I thought they had charged me wrong in the past but did not have proof. This trip I turned around and looked at what the pump said when it was done filling. The litres was about 15.35 and the ventas read 10.250. The station was very busy and I just signed the charge when he handed it to me , but pulled off to the side after and got my glasses out. Sure enough he had charged me the litres and not the ventas amount- which meant I had paid $30.13 instead of the $20.00 I should have paid (about 2 x's 10.25) I turned around and when they saw me coming back they immediately took money out of their pockets and gave it to me. I am writing this so others will read the pumps and make sure they charged you the correct amount. Other than that- another wonderful trip to Costa Rica!