Knowledge Base
Frequently Asked Questions About Vehicle Operating Costs
Explore comprehensive, data-backed answers to the most common questions regarding fuel economy, EV charging costs, routine maintenance schedules, vehicle depreciation, cost per mile metrics, and repair vs. replacement decisions.
General Car Cost & Ownership Questions
DriveCost multiplies your estimated annual gallons by the gasoline price you enter (or the national average). Estimated gallons = annual miles ÷ weighted MPG, where weighted MPG blends the EPA city and highway ratings using your city/highway driving split.
EPA ratings come from standardized lab tests at fueleconomy.gov. They are useful for comparing vehicles, but real-world economy varies with weather, traffic, speed, terrain, vehicle condition and driving style. DriveCost labels them "EPA-rated" and treats them as estimates.
Cost per mile = total annual operating costs ÷ annual miles. Operating costs include fuel or electricity, maintenance, tires and other recurring costs you enter. It excludes the one-time purchase price and depreciation.
Five-year energy cost is the annual energy cost multiplied by your ownership period. The full five-year ownership view also adds estimated maintenance, tires, depreciation and optional insurance/registration, using documented assumptions that are shown on the methodology page.
Yes — the ownership calculator estimates depreciation using a documented residual-value model (roughly 20% in year one, 10% per year afterwards). Depreciation is shown separately from operating costs so you can see both.
Gasoline Fuel Expenditure Questions
DriveCost multiplies your estimated annual gallons by the gasoline price you enter (or the national average). Estimated gallons = annual miles ÷ weighted MPG, where weighted MPG blends the EPA city and highway ratings using your city/highway driving split.
EPA ratings come from standardized lab tests at fueleconomy.gov. They are useful for comparing vehicles, but real-world economy varies with weather, traffic, speed, terrain, vehicle condition and driving style. DriveCost labels them "EPA-rated" and treats them as estimates.
Yes. City MPG is usually lower than highway MPG, so a higher city-driving share raises your estimated fuel cost. The city/highway sliders let you adjust this and see the result update instantly.
Fuel cost scales almost linearly with miles driven. Doubling your annual miles from 10,000 to 20,000 roughly doubles your annual fuel spend, all else equal. Use the mileage slider to explore the effect.
Cost per mile = total annual operating costs ÷ annual miles. Operating costs include fuel or electricity, maintenance, tires and other recurring costs you enter. It excludes the one-time purchase price and depreciation.
Five-year energy cost is the annual energy cost multiplied by your ownership period. The full five-year ownership view also adds estimated maintenance, tires, depreciation and optional insurance/registration, using documented assumptions that are shown on the methodology page.
Electric Vehicle (EV) & Charging Questions
DriveCost multiplies your estimated annual gallons by the gasoline price you enter (or the national average). Estimated gallons = annual miles ÷ weighted MPG, where weighted MPG blends the EPA city and highway ratings using your city/highway driving split.
EPA ratings come from standardized lab tests at fueleconomy.gov. They are useful for comparing vehicles, but real-world economy varies with weather, traffic, speed, terrain, vehicle condition and driving style. DriveCost labels them "EPA-rated" and treats them as estimates.
For an EV, DriveCost converts your annual miles to kWh using the EPA energy consumption rate (kWh per 100 miles), adds a charging-efficiency loss (default 12%), then multiplies by a blended electricity rate that combines your home and public charging prices by share of charging.
Often yes on a per-mile basis, but it depends on local electricity prices, charging location and the vehicle. DriveCost lets you enter your actual rates so the comparison reflects your situation instead of a generic average.
Use the rate from your utility bill (cents per kWh) for home charging. For public charging, use the app/station price. If you do not know, DriveCost falls back to a clearly-labelled state or national average — it is never presented as your actual tariff.
Cost per mile = total annual operating costs ÷ annual miles. Operating costs include fuel or electricity, maintenance, tires and other recurring costs you enter. It excludes the one-time purchase price and depreciation.
5-Year Total Cost of Ownership Questions
DriveCost multiplies your estimated annual gallons by the gasoline price you enter (or the national average). Estimated gallons = annual miles ÷ weighted MPG, where weighted MPG blends the EPA city and highway ratings using your city/highway driving split.
EPA ratings come from standardized lab tests at fueleconomy.gov. They are useful for comparing vehicles, but real-world economy varies with weather, traffic, speed, terrain, vehicle condition and driving style. DriveCost labels them "EPA-rated" and treats them as estimates.
Cost per mile = total annual operating costs ÷ annual miles. Operating costs include fuel or electricity, maintenance, tires and other recurring costs you enter. It excludes the one-time purchase price and depreciation.
Five-year energy cost is the annual energy cost multiplied by your ownership period. The full five-year ownership view also adds estimated maintenance, tires, depreciation and optional insurance/registration, using documented assumptions that are shown on the methodology page.
Yes — the ownership calculator estimates depreciation using a documented residual-value model (roughly 20% in year one, 10% per year afterwards). Depreciation is shown separately from operating costs so you can see both.
The big drivers are fuel/electricity, depreciation, maintenance, tires, insurance and how many miles you drive. Because miles and prices dominate, DriveCost makes those assumptions easy to change.
Head-to-Head Vehicle Comparison Questions
DriveCost multiplies your estimated annual gallons by the gasoline price you enter (or the national average). Estimated gallons = annual miles ÷ weighted MPG, where weighted MPG blends the EPA city and highway ratings using your city/highway driving split.
EPA ratings come from standardized lab tests at fueleconomy.gov. They are useful for comparing vehicles, but real-world economy varies with weather, traffic, speed, terrain, vehicle condition and driving style. DriveCost labels them "EPA-rated" and treats them as estimates.
Cost per mile = total annual operating costs ÷ annual miles. Operating costs include fuel or electricity, maintenance, tires and other recurring costs you enter. It excludes the one-time purchase price and depreciation.
Five-year energy cost is the annual energy cost multiplied by your ownership period. The full five-year ownership view also adds estimated maintenance, tires, depreciation and optional insurance/registration, using documented assumptions that are shown on the methodology page.
Yes — the ownership calculator estimates depreciation using a documented residual-value model (roughly 20% in year one, 10% per year afterwards). Depreciation is shown separately from operating costs so you can see both.