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What gas mileage does a 5.7 Hemi get?

The 5.7 Hemi engine, a popular choice among truck and SUV owners, is known for its powerful performance. However, many consumers are curious about the fuel efficiency of this engine. In this article, we'll dive into the details of the 5.7 Hemi's gas mileage and explore the factors that influence its fuel consumption.


Average Fuel Economy of the 5.7 Hemi


The 5.7 Hemi engine, found in various Dodge, Jeep, and Ram models, typically achieves an average fuel economy of 15-19 miles per gallon (MPG) in combined city and highway driving. This range can vary depending on the specific vehicle, driving conditions, and driving habits.


Factors Affecting Fuel Efficiency


Several factors can impact the fuel efficiency of the 5.7 Hemi engine, including:



  • Vehicle Weight: Heavier vehicles, such as trucks and SUVs, tend to have lower fuel efficiency compared to lighter passenger cars.

  • Driving Conditions: Driving in stop-and-go traffic, frequent acceleration and braking, and driving at high speeds can all reduce fuel efficiency.

  • Driving Habits: Aggressive driving, such as rapid acceleration and frequent lane changes, can significantly decrease fuel economy.

  • Engine Load: Towing heavy loads or driving in hilly terrain can increase the engine's workload, leading to higher fuel consumption.


It's important to note that the 5.7 Hemi engine is designed for performance, and fuel efficiency may not be its primary focus. Drivers who prioritize fuel economy may want to consider alternative engine options or hybrid/electric vehicles.


Improving Fuel Efficiency


While the 5.7 Hemi engine may not be the most fuel-efficient option, there are several ways drivers can improve its gas mileage:



  • Maintain Proper Tire Pressure: Ensuring the tires are properly inflated can improve fuel efficiency by reducing rolling resistance.

  • Use Recommended Fuel Grade: Using the recommended fuel grade, as specified by the vehicle manufacturer, can help optimize engine performance and fuel efficiency.

  • Avoid Excessive Idling: Turning off the engine when the vehicle is stationary for an extended period can save fuel.

  • Combine Errands: Planning trips to combine multiple errands can help reduce overall fuel consumption.


By understanding the factors that influence the fuel efficiency of the 5.7 Hemi engine and implementing these strategies, drivers can potentially improve the gas mileage of their vehicles and reduce their fuel costs.

How to make a 5.7 HEMI more fuel efficient?


The easiest way to do this is by driving at a moderate pace, but adjusting your vehicle can also help. For instance, a roof rack or an uncovered bed can increase the aerodynamic drag. Removing such accessories and getting a bed cover can significantly affect your fuel efficiency.



Does a 5.7 HEMI need premium gas?


Dodge Charger R/T
Turns out it's also for owners of Fiat Chrysler's Hemi 5.7-liter V-8, as the company recommends 89-octane fuel for this engine.



What year 5.7 Hemi to avoid?


The worst years
While the 5.7L HEMI is a powerful and reliable motor, it isn't free from bugs. A few model years, in particular, have proven more problematic than others. Model years 2011 and 2012 stand out when it comes to bad years for the 5.7L HEMI, with 2012 being an especially lousy period for Ram pickups.



Does premium gas give better mileage?


No, any fuel efficiency gained using premium fuel would stem from engine performance, not the gas itself. Buying premium gas won't have you visiting a gas station any less frequently, especially with a standard engine not designed to take advantage of premium gas.



What years to avoid for the 5.7 HEMI?


The worst years
While the 5.7L HEMI is a powerful and reliable motor, it isn't free from bugs. A few model years, in particular, have proven more problematic than others. Model years 2011 and 2012 stand out when it comes to bad years for the 5.7L HEMI, with 2012 being an especially lousy period for Ram pickups.



What are the drawbacks of a Hemi?


Most experts agree that a major drawback of the Hemi design is that it cannot incorporate four valves per cylinder. And that's OK when it comes to racing cars, which are limited to two valves anyway – but modern cars use an alternative design with four slightly smaller valves that let the engine breathe more easily.



Why does the 5.7 Hemi need 89 octane?


The higher the compression ration of your vehicle, the higher the horsepower. This is why high-performance engines require more octane. If you have the HEMI V8 engine, you should use the 89 octane, if you have the base V6 engine, then it is okay to use the 87.



What is the life expectancy of a 5.7 HEMI?


200,000 miles
The Chrysler 5.7 HEMI is a pretty reliable engine. Its longevity should be north of 200,000 miles if well maintained.



Is a 5.7 L HEMI good on gas?


5.7L HEMI® V8 Engine with eTorque:
2WD: 18 mpg city / 23 mpg highway. 4WD: 18 mpg city / 22 mpg highway.



Which Ram 1500 gets the best gas mileage?


Which Ram trucks have the best gas mileage? The Ram truck that gets the best gas mileage is the 2022 RAM 1500 with rear-wheel drive and the EcoDiesel V6 engine. Diesel engines are almost always more fuel-efficient than gasoline ones. This truck gets 22 miles per gallon in the city and 32 on the highway!


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.