The duration a vehicle's gas will last largely depends on its fuel efficiency, which is measured in miles per gallon (MPG). On average, a car with an MPG rating of 30 will travel approximately 300 miles on a full tank. However, this figure can vary significantly based on driving conditions, vehicle weight, and the efficiency of the engine. For instance, a heavier vehicle or one with a less efficient engine may only get around 200 miles per tank, while a more fuel-efficient model could exceed 400 miles.

The fuel efficiency of a vehicle is influenced by several factors. First, the type of fuel being used plays a crucial role. Premium gasoline, for example, may offer better performance and fuel efficiency compared to regular gasoline. Additionally, driving habits significantly impact fuel economy. Aggressive driving, rapid acceleration, and frequent braking can all reduce fuel efficiency. According to the U.S. Department of Energy, maintaining a consistent speed and avoiding unnecessary acceleration can improve fuel efficiency by up to 33%.

Data from the U.S. Environmental Protection Agency (EPA) provides further insight into fuel efficiency. The EPA's Fuel Economy Guide lists the estimated fuel economy for new vehicles, which can help consumers make informed decisions about their vehicle's fuel efficiency. For example, a 2021 Toyota Corolla with a combined MPG rating of 35 can travel approximately 335 miles on a full tank, assuming a 14.5-gallon tank capacity.

In summary, the duration a vehicle's gas will last is primarily determined by its fuel efficiency, which is influenced by factors such as the type of fuel, driving habits, and vehicle weight. On average, a car with a 30 MPG rating can travel around 300 miles on a full tank, but this figure can vary significantly based on individual circumstances.