2018 BMW 6 Series — Full Specifications
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The 2018 BMW 6 Series is a saloon/sedan offered with 2 engines (3L 6-cyl turbo, 4.4L 8-cyl turbo). Its most fuel-efficient configuration returns around 28 mpg (UK) / 23 mpg (US EPA) combined, with 23–28 mpg (UK) across all configurations. Owners often keep a BMW 6 Series workshop manual to hand for servicing and repairs.
Compared with the 2017 BMW 6 Series: Fuel economy is essentially unchanged at around 28 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine (most efficient) | 3L 6-cyl turbo |
|---|---|
| Engine options | 3L 6-cyl turbo · 4.4L 8-cyl turbo |
| Transmission (most efficient) | Automatic (S8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 97 cu ft (2,747 L) |
| Luggage Volume (EPA) | 12 cu ft (340 L) |
| Fuel Economy (UK) | 28 combined / 24 urban / 35 extra-urban mpg |
| Fuel Economy (US EPA) | 23 combined / 20 city / 29 highway mpg |
| CO₂ Emissions | 235 g/km |
| EPA Greenhouse Gas Score | 4 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,550 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 4 configurations for the 2018 BMW 6 Series across 2 engines (3L 6-cyl turbo, 4.4L 8-cyl turbo). Combined fuel economy ranges from 19 to 23 mpg (US), or 23 to 28 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 |
|---|---|---|---|---|---|---|
| 3L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 26 | 22 (19/28) | 246 | $3,750 |
| 3L 6-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 28 | 23 (20/29) | 235 | $3,550 |
| 4.4L 8-cyl turbo | Automatic (S8) | All-Wheel Drive | 23 | 19 (16/25) | 288 | $4,350 |
| 4.4L 8-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 24 | 20 (17/25) | 279 | $4,100 |
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 97 cubic feet (about 2,747 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2018 BMW 6 Series
Running Costs: 2018 BMW 6 Series
Covering around 8,000 miles a year in a 2018 BMW 6 Series at 28 mpg combined, expect roughly 1,299 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,550 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.
2018 BMW 6 Series 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.
Recalls & Owner Complaints (NHTSA)
NHTSA lists no safety recall campaigns for the 2018 BMW 6 Series as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
Owners have filed 11 complaints with NHTSA about the 2018 BMW 6 Series. The most-reported areas are Unspecified (2), Air bags (2), Forward collision avoidance (2). Complaints include 1 reported crash.
Used-buyer checklist for the 2018 BMW 6 Series
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Air bags (2 owner complaints) — Confirm any air bag inflator or module recalls were completed — enter the VIN at nhtsa.gov/recalls.
- Driver-assist sensors (2 owner complaints) — Check that driver-assist warning lights are off and sensors are clean and undamaged.
- Throttle & cruise control (1 owner complaint) — Check throttle response and cruise control are smooth, and ask about any software or throttle recalls.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
At 28 mpg (UK) combined it sits close to the 28 mpg average for BMW models in our database.
Of the 9 BMW 6 Series model years we cover, the 2018 ranks 4th for combined fuel economy on its best configuration (28 mpg UK combined, against a high of 31 mpg). See every BMW 6 Series year side by side.
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 2018 BMW 6 Series
Frequently Asked Questions
What engine does the 2018 BMW 6 Series have?
EPA lists 2 engines for the 2018 BMW 6 Series: 3L 6-cyl turbo, 4.4L 8-cyl turbo. The most fuel-efficient configuration pairs the 3L 6-cyl turbo with a automatic (s8).
What is the fuel economy of the 2018 BMW 6 Series?
The most efficient configuration returns around 28 mpg (UK) combined, or 23 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 23 to 28 mpg.
How much does the 2018 BMW 6 Series cost to fuel per year?
The US EPA estimates about $3,550 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.
Does the 2018 BMW 6 Series have any recalls?
NHTSA lists no safety recall campaigns for the 2018 BMW 6 Series as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
What are the most common problems reported for the 2018 BMW 6 Series?
Among the 11 owner complaints filed with NHTSA, the most-reported areas are Unspecified (2 complaints), Air bags (2 complaints), Forward collision avoidance (2 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2018 BMW 6 Series have?
EPA measures interior passenger volume at 97 cubic feet (about 2,747 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.