If I prepay 200 yuan for gas but the tank fills up before that amount is used, will the money be refunded?

[Silva]

If you preset an amount on the fuel dispenser but don't use up the full prepaid amount, the unused portion won't be charged - you'll only be billed for the actual fuel dispensed. Here's some relevant information about vehicle refueling: 1. Maximum vs. reasonable fuel tank capacity: The capacity marked on standard fuel tanks isn't the absolute maximum volume, but rather the maximum reasonable capacity. For example, a tank marked as 60L might actually hold up to about 70L when completely full. The 60L marking represents the safe operating range, allowing sufficient space for fuel expansion due to temperature increases, which ensures tank safety during use. 2. Refueling volume: The standard refueling amount shouldn't be determined based on the tank's rated capacity alone. A vehicle fuel tank is a container, not a measuring device, and therefore cannot serve as the basis for judging measurement accuracy. According to mandatory national standards, the rated capacity of automotive fuel tanks should be controlled at 95% of the maximum safe capacity.