Fiat averages 28.9 mpg combined across 4 petrol and diesel models (2012–2023). The best on record does 34 mpg, the thirstiest 25 — a yearly fuel gap of about $407. Its 1 electric model sits apart at 114.4 MPGe — 29.5 kWh per 100 miles, about $602 a year to charge, which is $727 less than the average Fiat costs to fuel.
What that actually costs
What a Fiat costs to feed, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Average combined | 28.9 mpg |
| Fuel per year | $1,329 |
| Most frugal on record | 34 mpg — $1,129 a year |
| Thirstiest on record | 25 mpg — $1,536 a year |
| Its electric models | 114.4 MPGe — $602 a year to charge |
Fiat models by gas mileage
From the most frugal down. The yearly figure is what the fuel actually costs at 12,000 miles.
| Model | Average mpg | Best / Worst engine | Fuel per year |
|---|---|---|---|
| Fiat 500 | 34 / 30 | $1,178 | |
| Fiat 124 Spider | 30 / 30 | $1,280 | |
| Fiat 500X | 28 / 26 | $1,433 | |
| Fiat 500L | 28 / 25 | $1,460 |
The electric Fiats, measured differently
Fiat has 1 model that never visit a filling station, averaging 114.4 MPGe. That figure looks four times better than the 28.9 mpg the petrol Fiats manage, but the two are not the same unit — so we keep them apart and price the electric ones in kilowatt-hours.
| Model | MPGe | kWh / 100 mi | Charging per year |
|---|---|---|---|
| Fiat 500e | 29.5 | $602 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
- Fuel tracker: what you really spend, month by month
- Insurance and fuel folded into 5-year cost to own
- Compare any two cars on total cost, not sticker price
- No ads, no tracking — and much more
How we count
Fiat rests on 27 EPA ratings covering 4 models from 2012 to 2023, plus 1 electric one counted separately in MPGe. The laboratory numbers are EPA's and go in unchanged; the money is ours, at 12,000 miles a year and $3.20 a gallon. Full method.
Frequently asked questions
What is the average Fiat gas mileage?
28.9 mpg combined across 4 models and 27 EPA ratings, from 2012 to 2023 — 11 model years in one figure, which is why it sits below what a new Fiat does today.
Which Fiat model is the most economical?
The Fiat 500 at 32.6 mpg, about $1,178 a year in fuel, against the 500L at 26.3 mpg and $1,460 — a gap of $282 a year between the two ends of the same badge.
How much does a Fiat cost to run?
About $1,329 a year in fuel, at 12,000 miles and $3.20 a gallon. Over five years that is $6,645, before a single service.
Does Fiat make anything electric?
Yes — 1 model, rated 114.4 MPGe rather than in mpg, which works out to 29.5 kWh per 100 miles and roughly $602 a year at the socket. That is $727 less than the average petrol Fiat, though the two ratings are not in the same unit.
Mark ForCar as a preferred source and our data shows up first in your Google results. One click, no account.