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Guides, tips, and in-depth articles about fuel economy, gas mileage calculation, and saving money on fuel.

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MPG Basics and Formulas Start with MPG math, conversions, and understanding label metrics. Trip Cost and Fuel Planning Plan road-trip and commute fuel spend with practical budgeting guides. EV Efficiency and MPGe Understand MPGe, charging costs, and apples-to-apples EV comparisons. Maintenance and Driving Habits Improve real-world fuel economy with behavior and upkeep checklists.

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Gas Mileage Calculator Track real MPG or L/100km from fill-up data. Trip Gas Cost Calculator Estimate gallons needed and total trip fuel spend. Cost Per Mile Calculator Compare per-mile costs across vehicles and routes. Gas vs EV Cost Calculator Run an apples-to-apples annual cost comparison.

Showing guides 46-60 of 61 (page 4 of 5).

Latest Guides

Speedometer close-up representing how higher speeds can reduce fuel economy
9 min read

Speed and Fuel Economy: What Happens Above 50 MPH

Speed has a measurable effect on fuel economy. The U.S. Department of Energy notes that gas mileage typically decreases rapidly at speeds above 50 mph and that speeding can reduce fuel...

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Heavy city traffic representing stop-and-go driving that can reduce fuel economy
9 min read

Stop-and-Go Traffic and MPG: What You Can (and Can’t) Control

Stop-and-go traffic often lowers MPG because it involves repeated acceleration and braking and often increases time spent idling. DOE and AFDC fuel-economy guidance highlights that...

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Close-up speedometer representing how fuel economy changes and why MPG comparisons can be misleading
8 min read

The MPG Illusion: Why MPG Isn’t Linear (and What to Use Instead)

MPG is a useful number, but it’s not linear. The same “+10 MPG improvement” can mean very different fuel savings depending on where you start. That’s why EPA includes a fuel consumption...

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Checking tire pressure with a gauge as a way to protect fuel economy and safety
10 min read

Tire Pressure and Fuel Economy: What Agencies Say (and How to Estimate Cost Impact)

Tire pressure is one of the most practical "small levers" for fuel economy because it's easy to measure and correct. FuelEconomy.gov summarizes the impact of underinflation on MPG and...

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Dashboard display showing fuel economy, representing how EPA label MPG numbers relate to real-world driving
9 min read

Understanding the EPA Fuel Economy Label (City, Highway, Combined MPG)

The EPA fuel economy label is a standardized window sticker for new vehicles that helps you compare fuel use, costs, and emissions across models. The most prominent number is Combined...

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Lineup of efficient vehicles representing MPGe comparisons across electric and gasoline cars
9 min read

What Is MPGe? How Electric Car Efficiency Is Measured

MPGe means miles per gallon equivalent . It is used for plug-in electric vehicles (including battery-electric vehicles and plug-in hybrids when running on electricity) to express energy...

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Car air conditioning vents on dashboard showing AC controls that affect gas mileage and fuel economy
9 min read

Does Air Conditioning Use More Gas?

Yes, does air conditioning use more gas is a question with a definitive answer—running your car's AC can reduce fuel economy by 5% to 25% depending on driving conditions, outside...

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Highway driving versus city driving showing the difference in fuel economy and MPG between highway and city conditions
9 min read

Highway vs City MPG: Why They Differ and What It Means

Highway MPG is typically 20–30% higher than city MPG for conventional gasoline vehicles because steady-speed cruising is far more fuel-efficient than the constant stopping and...

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Close-up of a gas pump nozzle filling a car tank, representing fuel economy and miles per gallon calculation
12 min read

How Do You Calculate Your Miles Per Gallon?

To calculate your miles per gallon (MPG), divide the total miles you drove by the number of gallons of fuel used. Fill up your tank, reset your trip odometer, drive normally, then fill...

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Long distance highway stretching into the horizon representing the cost of driving 1000 miles on a road trip
9 min read

How Much Does It Cost to Drive 1000 Miles?

The cost to drive 1,000 miles ranges from about $50 to $200 or more, depending on your vehicle's fuel economy and the price of gas—a sedan averaging 30 MPG with gas at $3.50 per...

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Open highway stretching into the distance under a clear sky, representing road trip fuel planning and budgeting gas costs
8 min read

How to Calculate Fuel Cost for a Road Trip

To calculate fuel cost for a road trip, divide your total trip distance by your vehicle's miles per gallon (MPG), then multiply by the current price per gallon of gas. For example, a...

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Gas station pump displaying fuel prices, representing strategies for saving money on gas
10 min read

How to Save Money on Gas

Learning how to save money on gas can cut hundreds of dollars from your annual fuel budget through smarter driving habits, regular vehicle maintenance, and strategic fueling choices....

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Gas pump octane selection buttons showing regular 87, mid-grade 89, and premium 91 or 93 fuel options
9 min read

Is Premium Gas Worth It?

Premium gas is only worth the extra cost if your vehicle's owner's manual specifically states that it is required—not merely recommended—because engines designed for regular...

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Close-up of a car speedometer showing both miles and kilometers markings, used for fuel economy conversion between MPG and L/100km
8 min read

MPG to L/100km: How to Convert Fuel Economy Units

To convert MPG to L/100km, divide 235.215 by your US MPG figure—for example, 30 MPG equals roughly 7.8 L/100km. If you are working with Imperial (UK) MPG, divide 282.481 instead,...

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Fuel-efficient vehicles lined up for gas mileage comparison, showing the range of MPG across modern cars, hybrids, and SUVs
8 min read

What Is Good Gas Mileage for a Car?

Good gas mileage depends on vehicle type, but as a general benchmark, any car achieving 30 MPG or higher is considered fuel-efficient, while the overall U.S. fleet average sits at 27.2...

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