How Much Gas Does Drafting Save? UNVERIFIED
Understanding the fuel savings from drafting behind a tractor trailer and its implications for electric vehicles like Tesla.
There's no confirmed answer to this yet. Below is what is and isn't known — we'd rather be honest than invent a number or a spec. This becomes a full guide the moment we can confirm it; for now, your owner's manual is the authority on your specific car.
What is Drafting?
Drafting, or slipstreaming, is a technique where a vehicle follows closely behind another to reduce air resistance. This can lead to significant fuel savings for conventional gasoline vehicles, as they experience less aerodynamic drag when in the wake of a larger vehicle like a tractor trailer.
Fuel Savings from Drafting
The exact amount of fuel saved while drafting can vary widely based on several factors, including the speed of the vehicles, the distance maintained between them, and the size of the lead vehicle. Generally, drafting can improve fuel efficiency by 10% to 20% for conventional vehicles, but this is highly dependent on the conditions.
Implications for Electric Vehicles
For electric vehicles (EVs) like Tesla, the concept of drafting is less applicable in terms of fuel savings, as they do not use gasoline. However, drafting can still enhance the efficiency of an EV by reducing the energy required to overcome air resistance, potentially extending range. The actual savings would depend on the driving conditions and how closely the EV can follow the larger vehicle.
Safety Considerations
While drafting can save fuel, it is important to consider safety. Following too closely behind a large vehicle can reduce visibility and reaction time, increasing the risk of accidents. It is crucial to maintain a safe distance and be aware of the driving environment.
EPA/DOE FuelEconomy.gov data retrieved 2026-07-24.