How much fuel does a van burn at idle in 1 hour?

The fuel consumption of a van idling for one hour typically ranges from 0.5 to 1 gallon, depending on the engine size, type, and efficiency. Smaller, more fuel-efficient vans may burn closer to 0.5 gallons, while larger or older models may consume up to 1 gallon or more. Factors like air conditioning use and engine condition can also affect idle fuel consumption.