Fiat Mobi Oil Capacity & Oil Type
TL;DR
Fiat Mobi capacity depends on which engine is under the hood (1.0 Fire Evo I4 vs 1.0 Firefly I3) - check your oil filler cap, dipstick markings, or owner's manual for the exact liter figure for your engine and year.
Two different engines, two different numbers
The Mobi is a Brazil/Latin-America market hatchback (this page treats that market version as the primary subject, not any European or North American spec). Over its production run Fiat offered it with the older 1.0 Fire Evo, an inline four-cylinder Flex (gasoline/ethanol) engine, and later the 1.0 Firefly, an inline three-cylinder Flex engine. Because the two engines use different blocks, sumps and oil pumps, one single oil capacity figure cannot honestly cover both, and a page that quotes one number for the whole model line risks being wrong for your car.
Why we are not printing an unverified liter number
Oil-capacity figures are trim- and generation-specific, and small errors (mixing up a previous engine generation's figure with the current one, or writing liters where quarts were meant) lead to a badly overfilled or underfilled sump. We were unable to confirm, against a live and checkable source, a single precise with-filter capacity in liters for either the 1.0 Fire Evo or the 1.0 Firefly at the time this page was written. Rather than state an invented figure, we point you to where the correct number for your exact vehicle lives.
Where to find the exact figure for your car
- The engine oil filler cap, which is often marked with the recommended viscosity grade.
- The owner's manual (manual do proprietário), in the maintenance / fluids chapter - this lists the exact capacity with filter for your specific engine and model year.
- The dipstick markings (MIN/MAX), useful for topping up correctly between full changes even without knowing the total liter figure.
- An authorized Fiat dealer's service data system, which selects the figure by chassis/VIN and is the most reliable source for a car already in front of you.
Viscosity
Fiat's Flex engines in this class (Fire and Firefly families) have historically specified a 5W-30 semi-synthetic or synthetic oil in Brazil, but the exact approved grade and change interval can vary by model year and by whether the car runs on gasoline, ethanol or a flex blend. Confirm the grade printed on your filler cap or in your owner's manual before topping up or changing oil, since using the wrong grade can affect cold-start protection and long-term engine wear.
| Engine code / years | Capacity with filter (L / US qt) | Viscosity |
|---|---|---|
| 1.0 Fire Evo, I4 (early Mobi generation) | Not independently verified - check filler cap, dipstick or owner's manual for your build | Typically 5W-30 (confirm on filler cap/manual) |
| 1.0 Firefly, I3 (later Mobi generation) | Not independently verified - check filler cap, dipstick or owner's manual for your build | Typically 5W-30 (confirm on filler cap/manual) |
Bottom line
Identify which engine your Mobi has (Fire Evo four-cylinder or Firefly three-cylinder) before buying oil or a filter, then confirm the exact liter figure and viscosity from the filler cap, dipstick or owner's manual rather than from any generic model-wide number, including this one.
Summary
| Market covered | Brazil / Latin America (primary Mobi market) |
|---|---|
| Engine families | 1.0 Fire Evo (I4) and 1.0 Firefly (I3) |
| Verified liter figure | Not independently confirmed for this page - check your filler cap, dipstick or manual |
| Typical viscosity | 5W-30 (confirm on filler cap or owner's manual) |
| Best source for your exact car | Owner's manual fluids chapter, filler cap, or dealer VIN lookup |
| Fuel type consideration | Flex-fuel (gasoline/ethanol) - grade approval may vary by fuel used |
Full diagnostics
For the complete step-by-step diagnostic and repair guide, see Fiat Mobi: Common Problems, Fault Codes & Repairs.
Frequently asked questions
Does every Fiat Mobi take the same amount of oil?
No. The Mobi was sold with at least two different engine families in Brazil/Latin America - the 1.0 Fire Evo four-cylinder and the later 1.0 Firefly three-cylinder - and they do not share an oil pan or pump, so a single capacity figure cannot be assumed to cover both. Always match the figure to your specific engine code and model year.
Where on the car can I find the exact oil capacity?
Check the engine oil filler cap (often printed with the viscosity grade), the dipstick MIN/MAX markings, and the maintenance/fluids section of the owner's manual (manual do proprietário), which lists the exact with-filter capacity for your engine and model year. A Fiat dealer's service system can also pull the figure by VIN.
What oil viscosity does the Fiat Mobi use?
Fiat's Fire and Firefly Flex engines in this segment have generally used 5W-30 oil in Brazil, but the approved grade can differ by model year and fuel type (gasoline, ethanol or flex blend), so confirm the exact grade on your filler cap or in your owner's manual before a change.
Is it safe to just use the same capacity as a Fiat Uno or Palio with the same engine?
Only if you have confirmed the sibling model uses the exact same engine code, generation and oil pan as your Mobi - Fiat shared the Fire and Firefly engine families across several small models, but running changes between years mean you should verify the engine code match, not just the model name, before assuming the capacity carries over.