Rajan Wilcox
Fuel mileage is a critical aspect of NASCAR racing, and while fuel gauges are absent from the cars, it is estimated that a NASCAR racecar gets about 4.6 miles per gallon. The amount of fuel burned depends on the length of the race and the speed of the car, with shorter races on smaller tracks burning less fuel than longer races on bigger tracks. Other factors influencing fuel mileage include drafting, caution flags, and drivers' efforts to save fuel. NASCAR is planning to adopt regenerative braking and hybrid technology, which may impact fuel usage in the future.
| Characteristics | Values |
|---|---|
| Fuel mileage | Critical part of any NASCAR race |
| Fuel gauges | Not equipped in NASCAR Cup Series cars |
| Fuel mileage determination | Math, experience, and instinct |
| Fuel mileage variability | Track and speed |
| Caution flag laps | 2 laps = 1 green flag lap of fuel consumption |
| Fuel mileage impact | Drivers saving fuel, drafting, caution flags |
| Fuel mileage variability | Track length, car speed, driver tactics |
| Fuel usage per car | 100 gallons for a 500-mile race |
| Fuel usage per car | 80 gallons for a 400-mile race |
| Fuel mileage | Approximately 5 miles per gallon |
| Fuel tank capacity | 18-18.5 US gallons |
| Daytona 500 (2015) | 43 cars used 5375 gallons of fuel |
| Daytona 500 (2019) | Winner pitted 6 times for fuel |
| Coca-Cola 600 | Longest NASCAR race |
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What You'll Learn
Fuel mileage strategies
NASCAR teams are allowed to fill up with as much fuel as they want, and refuelling can occur during races. The fuel cells in NASCAR cars hold approximately 18 US gallons, but teams will often put in as little as possible to keep the car lighter and faster. The amount of fuel used during a race depends on various factors, including the length of the race, the speed of the car, the driving style, and the number of caution flag laps.
During a race, crew chiefs need to predict the amount of fuel left in their tanks to make strategic decisions. They use mathematical calculations, experience, and instinct to determine fuel mileage. Electronic control units also provide information to help teams with these calculations. The driving style can impact fuel usage, as charging deeper into a turn before easing off the gas pedal can use more fuel. Additionally, the racing surface can affect tire wear, which in turn influences fuel mileage.
Caution flag laps also play a role in fuel mileage. During caution flag conditions, cars run slower and burn less fuel. As a rule of thumb, two caution flag laps are equivalent to one green flag lap in terms of fuel consumption. Therefore, caution flags can extend the fuel window if there are enough of them during a race.
Another factor to consider is drafting, which allows drivers to maintain speed without using as much throttle. This technique is particularly useful on superspeedways and can help drivers in the middle of the pack conserve fuel.
Overall, while there is no accurate measure of the total fuel usage of a car in a NASCAR race, fuel mileage strategies remain a critical aspect of the competition, requiring teams to carefully balance speed and fuel conservation to optimize their performance on the track.
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Track size
The amount of fuel used in a NASCAR race depends on a variety of factors, including the length of the race in terms of miles, the size of the track, the number of laps, the speed of the cars, and the driving strategy.
NASCAR Cup Series cars use a standard 18-gallon fuel tank, as mandated by NASCAR. However, the actual amount of fuel consumed during a race can vary significantly. For example, shorter races on smaller tracks with more turns and shorter straights, such as the Bristol Motor Speedway, typically average lower speeds of around 125 mph. In contrast, larger tracks like the Michigan International Speedway allow for higher speeds of about 200 mph.
The driving strategy also plays a crucial role in fuel consumption. Factors such as drafting, caution flags, and fuel-saving techniques can significantly impact how much fuel is used. Drafting, where drivers maintain speed by drafting behind other cars, reduces throttle usage and results in lower fuel consumption. Caution flag conditions, where cars run at slower speeds, also contribute to reduced fuel usage. Additionally, drivers can employ fuel-saving techniques, such as minimizing tire friction and smooth acceleration, to optimize fuel efficiency.
While exact calculations are challenging due to various factors, estimates suggest that shorter tracks may use around 50-60 gallons of fuel, intermediate tracks around 70-80 gallons, and superspeedways around 80-90 gallons. However, these estimates can be influenced by factors such as the number of caution laps and the efficiency of fuel-saving strategies employed by drivers.
It's worth noting that the fuel consumption of NASCAR races also pales in comparison to the fuel used by spectators travelling to and from the event, with many attendees driving long distances in motorhomes.
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Caution flags
Secondly, caution flags play a role in race strategy and lap management. In the past, leaders would sometimes slow down under a caution flag, allowing lapped cars to pass and regain a lap before crossing the start/finish line. This practice, known as "racing back to the caution," has been a source of controversy and was officially banned by NASCAR in 2003. However, exceptions have been made through the beneficiary rule, where the highest-placed car not on the lead lap is given a lap back if a caution occurs.
The use of caution flags has evolved over the years, with NASCAR introducing stage racing in 2017 to divide races into three segments, guaranteeing two yellow flags to bunch the field. While caution flags are typically associated with safety concerns, NASCAR has also used "phantom debris" cautions to halt a race due to objects on the track that may not be visible. This practice has been criticized and mocked, leading to a shift back towards using caution flags primarily for safety reasons.
In conclusion, caution flags are an essential part of NASCAR races, affecting fuel consumption, race strategy, and safety protocols. The usage of caution flags has been a topic of debate, with NASCAR making adjustments to balance safety and the desire for green-flag finishes. The impact of caution flags on fuel mileage and race dynamics adds another layer of complexity and intrigue to NASCAR competitions.
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Drafting
Fuel mileage is a critical component of any NASCAR race, with fuel savings tactics often making the difference between winning and losing. Drafting is one such tactic that can significantly impact fuel consumption.
The impact of drafting on fuel mileage is significant. During a race, drivers will try to maintain their position within the pack to take advantage of the drafting effect. However, if a driver moves up from the middle of the pack to the top four, their lap times may increase, resulting in lower fuel mileage. Additionally, caution flag conditions can also affect fuel consumption. Under caution, cars run slower and burn less fuel, with two caution flag laps roughly equalling one green flag lap in fuel usage.
While there is no accurate measure of total fuel usage per car in a NASCAR race due to varying track conditions, driving styles, and other factors, it is estimated that a stock car will use 100 gallons of fuel during a typical 500-mile race. NASCAR racecars generally get around 4.6 miles per gallon, but this can vary depending on driving conditions and strategies, such as drafting.
In summary, drafting is a crucial technique in NASCAR racing that allows drivers to maintain speed while conserving fuel. By positioning themselves behind other cars, drivers can reduce air resistance and throttle usage, improving their fuel mileage. This tactic plays a significant role in race strategy and can often be the key to victory.
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Driving styles
The position of a car in the pack can also influence fuel mileage. Childers explains that when a car moves from the middle of the pack to the top four, its lap times can decrease by almost a second, resulting in lower fuel mileage. Therefore, crew chiefs and engineers need to be mindful of the car's position and adjust their strategies accordingly to ensure they don't run out of fuel.
Drafting is another driving technique that can impact fuel usage. On superspeedways, drivers in the middle of the pack can maintain their speed with less throttle due to the draft. This allows them to conserve fuel by using half-throttle while still remaining in the pack. Caution flag conditions also play a role in fuel consumption. During these periods, cars run slower and burn less fuel. As a rule of thumb, two caution flag laps are equivalent to one green flag lap in terms of fuel usage.
The racing track itself also affects fuel mileage. Shorter races on smaller tracks generally burn less fuel than longer races on bigger tracks. However, this assumes that cars are running at full speed throughout the race, which is often not the case. Factors such as caution flags, drafting, and individual driving styles can significantly impact fuel consumption on different tracks.
In summary, driving styles, track conditions, and race dynamics all play a crucial role in determining fuel mileage in NASCAR races. Crews and drivers must carefully consider these factors when strategizing to optimize their fuel usage and ultimately improve their chances of winning.
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Frequently asked questions
The amount of fuel used depends on several factors, including track size, race length, and car speed. A Cup Series Next-Gen car has an 18-gallon fuel tank and gets approximately 4.6 miles per gallon, but fuel mileage can vary.
Three factors that play a major role in fuel mileage are drivers saving fuel, drafting, and caution flags. Shorter races on smaller tracks generally burn less fuel than longer races on bigger tracks.
Caution flags indicate slower speeds, resulting in less fuel consumption. A general rule is that 2 caution flag laps equal the fuel consumption of 1 green flag lap.
Fuel mileage is critical in NASCAR racing, and saving fuel can be the difference between winning and losing. Teams use math, experience, and instinct to determine fuel mileage, and strategic decisions about fuel can create drama and intrigue during a race.
