2018 Bentley Mulsanne Service Schedule & Maintenance Guide

The 2018 Bentley Mulsanne stands as a monument to British luxury and engineering, powered by a hand-built 6.75L twin-turbo V8. As a flagship sedan of immense complexity, adhering to a precise service schedule is not just recommended—it is essential for preserving its performance, reliability, and significant investment value.

Key Takeaways

• Primary Service Interval: Bentley mandates scheduled maintenance every 12 months or 16,000 km (approximately 10,000 miles), whichever comes first .
• Engine & Performance: The 2018 Mulsanne is powered by a 6.75L twin-turbo V8 (engine code CZMA), producing up to 512 hp (or 537 hp in the Speed variant) . The engine has a basic oil capacity of 9.4 liters .
• Factory Warranty: New 2018 models came with a comprehensive 3-year/unlimited mileage warranty covering basic, powertrain, corrosion, and roadside assistance .
• Service Indicator: The vehicle is equipped with a standard service interval warning system on the instrument cluster .
• Drivetrain: All 2018 Mulsanne models feature rear-wheel drive .

Factory Recommended Service Schedule

Primary Service Interval

Bentley's official service guidelines are straightforward: service is required once a year, or every 16,000 km (approximately 10,000 miles), whichever comes first . The first year of Bentley service is complimentary for the original owner, covering this initial inspection .

The vehicle is equipped with a service interval warning system that alerts the driver when scheduled maintenance is approaching .

Annual / 16,000 km Service Contents

At each scheduled visit, the following baseline items are recommended :

Following the vehicle check, owners are informed of any components that are not up to specification, at which time they can approve any necessary repairs .

Progressive Service Schedule

While the 16,000 km annual service forms the foundation, more comprehensive services are performed at higher mileage intervals. Based on industry-standard guidance, the following milestones are relevant:

Engine Oil Change Guidance

Oil Specifications and Capacities

The 6.75L twin-turbo V8 in the 2018 Mulsanne (engine code CZMA) requires high-quality fully synthetic oil meeting Bentley's stringent factory standards . The basic oil fill capacity is 9.4 liters .

A suitable engine oil meets the following specifications :

• Viscosity: 5W-30
• ACEA: C3
• API: SN
• Approvals: BMW Longlife-04, MB-Approval 229.51, Porsche C30, VW 504.00, VW 507.00

Oil Change Interval

• Factory Recommendation: Every 12 months or 16,000 km (10,000 miles) .
• Conservative Owner Guidance: For vehicles driven primarily in extreme climates or for short urban journeys, some specialists recommend reducing the interval.

Regular oil and filter changes are the single most important maintenance item for preserving the longevity of the 6.75L twin-turbo V8.

Transmission Service

Service Considerations

The 2018 Mulsanne is equipped with a sophisticated automatic transmission. The question of whether the transmission fluid needs to be changed depends on a variety of factors .

Important Guidance: Some modern transmissions are designed to never need a fluid change unless there is a leak or another problem, while others have a regular maintenance interval . It is crucial to follow the specific guidelines outlined in the Bentley owner's manual for the 2018 Mulsanne .

Warning Signs

If shifting becomes rough, delayed, or is accompanied by unusual noises or lurching, have the transmission inspected immediately by a Bentley service center .

Brake Fluid Service

Fluid Type and Service Interval

The 2018 Mulsanne uses high-performance brake fluid suitable for its advanced braking system.

• Replacement Interval: A conservative approach is to replace brake fluid every 2 years (24 months), regardless of mileage, as brake fluid is hygroscopic and absorbs moisture over time, degrading braking performance.
• Schedule Integration: This service is typically performed at the 20,000-mile or 24-month service.

Additional Service Items

Fuel Filter

Changing the fuel filter is part of the repair and maintenance schedule for the Mulsanne. Many car companies recommend changing the fuel filter every 5 years or 50,000 miles, though this may vary based on driving habits and local fuel quality . The owner's manual provides the most specific information for your vehicle.

Air Suspension

Air suspension issues are a frequently mentioned area of consideration on Mulsannes of this era. Air springs are known to leak, which can cause the car to drop when turned off, and are costly to repair . While not catastrophic, as the vehicle will maintain pressure while running, it is an important area for regular inspection .

Long-Term Ownership Considerations

Service Documentation

Maintaining a comprehensive service history is critical for preserving the vehicle's resale value. The official operating instructions manual for the Mulsanne (part number 3Y4 012 774 AA) is an essential resource for understanding the vehicle's features, controls, and maintenance procedures .

Specialist Care

Given the vehicle's complexity, service should be performed by certified Bentley technicians or independent specialists with the right equipment and genuine parts.

Cost Awareness

Owning a Bentley Mulsanne comes with significant maintenance costs. Routine services can easily run into thousands of pounds, and even minor repairs can become quite expensive . It is essential for owners to budget adequately for these expenses .