2010 Infiniti M45 — Full Specifications
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The 2010 Infiniti M45 is a saloon/sedan powered by a 4.5L 8-cyl premium gasoline engine. Its most fuel-efficient configuration returns around 22 mpg (UK) / 18 mpg (US EPA) combined, with 19–22 mpg (UK) across all configurations. Owners often keep a Infiniti M45 workshop manual to hand for servicing and repairs.
Full Specifications
| Engine | 4.5L 8-cyl |
|---|---|
| Transmission | Automatic (S5) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 105 cu ft (2,973 L) |
| Luggage Volume (EPA) | 15 cu ft (425 L) |
| Fuel Economy (UK) | 22 combined / 19 urban / 25 extra-urban mpg |
| Fuel Economy (US EPA) | 18 combined / 16 city / 21 highway mpg |
| CO₂ Emissions | 307 g/km |
| EPA Est. Annual Fuel Cost | $4,550 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2010 Infiniti M45, all with the 4.5L 8-cyl engine. Combined fuel economy ranges from 16 to 18 mpg (US), or 19 to 22 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 4.5L 8-cyl | Automatic (S5) | All-Wheel Drive | 19 | 16 (14/20) | 345 | $5,150 |
| 4.5L 8-cyl | Automatic (S5) | Rear-Wheel Drive | 22 | 18 (16/21) | 307 | $4,550 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 105 cubic feet (about 2,973 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2010 Infiniti M45
Running Costs: 2010 Infiniti M45
Covering around 8,000 miles a year in a 2010 Infiniti M45 at 22 mpg combined, expect roughly 1,653 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $4,550 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2010 Infiniti M45 Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
How It Compares
Infiniti models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2010 Infiniti M45's 22 mpg is 4 mpg below that make average. Its 307 g/km CO₂ figure is 44 g/km higher than the 263 g/km Infiniti average.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2010 Infiniti M45
Frequently Asked Questions
What engine does the 2010 Infiniti M45 have?
It's fitted with a 4.5L 8-cyl premium gasoline engine, paired with a automatic (s5) transmission.
What is the fuel economy of the 2010 Infiniti M45?
The most efficient configuration returns around 22 mpg (UK) combined, or 18 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 19 to 22 mpg.
How much does the 2010 Infiniti M45 cost to fuel per year?
The US EPA estimates about $4,550 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
How much interior and luggage space does the 2010 Infiniti M45 have?
EPA measures interior passenger volume at 105 cubic feet (about 2,973 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.