2020 BMW I8 Roadster
1.5L 3-cyl · 6-speed automatic · AWD
Plug-in hybridPremium and ElectricityTwo Seaters
Official EPA record #42370 from FuelEconomy.gov · data 2026-07-26 · every assumption below is yours to edit. How this is computed
Per month
$143.52
Per year
$1,722
Per mile
14.4¢/mi
5-year total
$8,610
Driving mix55% city / 45% highway
$/kWh
Cold weatherillustrative
Per fueleconomy.gov cold-weather guidance for 20°F short city trips — off by default.
Default 42% is the EPA utility factor for this vehicle — a modeled share of miles driven on plug-in charge.
Notes & official EPA estimate
2,475 kWh of electricity / year255.2 gal of fuel / yearelectricity @ $0.18/kWhgasoline @ $4.96/galAt $5.96/gal: $164.79/mo
- Electric-mile share defaults to the EPA utility factor for this vehicle (42% of miles in charge-depleting mode, based on typical daily driving and charging once per day). Adjust it to match your own charging habits.
- MPGe values shown on the EPA label combine electricity and gasoline and cannot be used as ordinary MPG; this estimate prices each energy source separately instead.
Official FuelEconomy.gov estimate: $2,850/year — assumes 15,000 miles/year and EPA price assumptions. The figures above use your inputs instead.
Compare with another vehiclePrices: EPA national averages, Jul 24, 2026 — override anytime.
At 12,000 miles per year (55% city / 45% highway) with EPA national-average prices ($4.96/gal premium, $0.18/kWh), this 2020 BMW I8 Roadster costs about $143.52 per month in gasoline and electricity — $1,722 per year, 14.4¢/mi, $8,610 over five years.Assumptions are editable below. Prices as of July 24, 2026 · EPA vehicle record #42370. EPA figures are laboratory estimates; real-world cost varies with driving conditions, weather, and where you buy energy.
Official EPA efficiency
| Measure | Value |
|---|---|
| Gasoline mode MPG (city/hwy/combined) | 26 / 29 / 27 |
| Electric mode use (city/hwy/combined) | 50.0 / 48.0 / 49.0 kWh/100 mi |
| EPA composite MPGe (never used as MPG here) | 34 / 38 / 36 |
| EPA utility factor (share of electric miles) | 42% |
| Electric range | 18 mi |
Official EPA estimates
| Estimate | Value |
|---|---|
| Official annual fuel cost (15,000 mi/yr) | $2,850/yr |
| Total range (gas + electric) | 320 mi |
| Tailpipe CO₂ | 191 g/mi |
| EPA greenhouse gas score | 10/10 |
| EPA smog rating (Federal Tier 3 Bin 125) | 3/10 |
| Charge time at 240V | 3 h |
Source: U.S. EPA / DOE FuelEconomy.gov, vehicle record #42370 (record updated 2022-03-25). Snapshot processed 2026-07-26; page data last changed 2022-03-25.
Related configurations
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