| Engine | 1.5L I4 Hybrid |
|---|---|
| Transmissions | Automatic (variable gear ratios) |
| Drivetrain | FWD |
| Fuel type | Regular Gasoline |
| EPA combined (best) | 52 mpg |
| EPA combined (worst) | 48 mpg |
| Annual fuel cost (best) | $1,300 |
| Vehicle class | Compact Cars, Midsize Cars |
2 configurations were certified by the EPA for the 2021 model year. Combined mpg is the figure the EPA uses for its window sticker.
| Engine | Transmission | Drive | City | Highway | Combined | Fuel cost/yr | CO₂ g/mi | Fuel |
|---|---|---|---|---|---|---|---|---|
| 1.5L I4 Hybrid · Start-stop | Automatic (variable gear ratios) | FWD | 51 | 45 | 48 | $1,400 | 184 | Regular Gasoline |
| 1.5L I4 Hybrid · Start-stop | Automatic (variable gear ratios) | FWD | 55 | 49 | 52 | $1,300 | 170 | Regular Gasoline |
Source: U.S. Department of Energy fuel economy certification data (vehicles.csv), retrieved 2026-10-27.
Official Honda fluid capacities for the 2021 Honda Insight have not yet been verified against service documentation. Rather than publish an unverified number, this table is empty on purpose.
Same rule applies: no verified source, no number. Torque values are being added model by model from official service information.
The official 2021 Honda Insight owner's manual is published by Honda. We do not host or mirror manual files — copyright stays with the manufacturer, and a mirror is exactly what gets a site like this taken down.
Search your exact model year and trim on the manufacturer's owner site, or request a copy from any authorized dealer using your VIN.
Official Honda owner siteLink verified reachable; manufacturer pages change without notice. If it 404s, tell us and we will fix it.
If you need torque specifications and wiring diagrams, those live in the paid service information system rather than the free owner's manual. We are adding verified torque values model by model.
The most efficient 2021 Insight configuration the EPA certified is rated 52 mpg combined; the least efficient is 48 mpg combined.
The EPA certified 1 engine configuration for the 2021 model year: 1.5L I4 Hybrid.
Automatic (variable gear ratios).
It was offered in FWD configuration.
From Honda's official owner site (owners.honda.com) or from an authorized dealer. We link to the official source rather than hosting the file.
We have not yet verified fluid capacities (oil, coolant, transmission), torque specifications, maintenance intervals for the 2021 Honda Insight against official Honda service documentation. Rather than guess, those fields are left empty. A wrong torque value can destroy an engine, so we only publish figures we can trace.
Engines, transmissions, drivetrain and fuel economy on this page come from U.S. Department of Energy EPA certification data for the 2021 model year. Model year existence is confirmed against NHTSA vehicle registration data. Retrieved 2026-10-27. Fields with no official source are left empty.