2014 Bentley Continental GT Speed Convertible Complete Maintenance Schedule & Service Guide

The 2014 Bentley Continental GT Speed Convertible represents the pinnacle of open-air grand touring, powered by a twin-turbocharged 6.0L W12 engine producing 616 horsepower . With 590 lb-ft of torque at just 2,000 rpm and an 8-speed automatic transmission driving all four wheels, this is a vehicle of substantial complexity and performance . A diligent maintenance regimen is not optional—it is essential for preserving its performance, reliability, and significant investment value.

Key Takeaways

• Primary Service Interval: Bentley requires scheduled maintenance once a year or every 10,000 miles, whichever comes first. This applies to the 2014 Continental GT Speed Convertible and is the foundation of ownership .
• Factory Warranty: New 2014 models came with a 3-year/unlimited mileage basic and powertrain warranty, plus a 1-year/10,000-mile maintenance warranty covering the first scheduled service .
• Service Structure: Bentley follows a recurring 4-year cycle: Minor service at 10,000 miles, Intermediate at 20,000 miles, Minor at 30,000 miles, and Major at 40,000 miles .
• Engine: The 6.0L twin-turbo W12 requires precise lubrication with high-quality fully synthetic oil.
• Transmission: The vehicle is equipped with an 8-speed shiftable automatic transmission and features all-wheel drive .
• Service Indicator: Standard equipment includes a service interval warning system on the instrument cluster.

Factory Recommended Service Schedule

Primary Service Interval

Bentley's official service guideline is clear and consistent: once a year, or every 10,000 miles, whichever comes first . The first year of Bentley service was complimentary for the original owner, covering the initial 10,000-mile service .

The service interval warning system on the instrument cluster is triggered either by time or mileage, whichever occurs first. Even if the mileage threshold has not been reached, the service reminder will activate after 12 months.

Service Structure Progression

Bentley service schedules follow a recurring 4-year cycle of service types that increase in scope as the vehicle accumulates mileage :

This pattern repeats throughout the vehicle's life. Documented examples show annual servicing by Bentley main dealers, with services performed even at very low mileages. A 2014 example with only 21,000 miles had seven Bentley dealer service records from pre-delivery through 2020 .

Annual / 10,000-Mile Service Contents

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

• Engine Oil & Filter: Replaced with Bentley-specification fully synthetic oil
• Cabin Pollen Filter: Replaced
• Windshield Wipers: Replaced as needed
• Key Fob Battery: Replaced
• Brake System: Comprehensive inspection of brake pads and discs
• Fluid Levels: All vehicle systems checked and topped up
• Leakage Inspection: Visual inspection for fluid leaks
• Suspension: Comprehensive inspection of all components, including the air suspension system
• Tire Rotation: All four tires rotated for even wear

Following the vehicle inspection, owners are informed of any components not meeting specification, at which point they can approve any necessary repairs.

Engine Oil Change Guidance

The 6.0L twin-turbo W12 engine in the Continental GT Speed Convertible requires precise lubrication with high-quality fully synthetic oil.

Oil Change Interval

• Factory recommendation: Every 12 months or 10,000 miles
• Conservative owner guidance: Never exceed 12 months for an oil change, even if the mileage is low, as synthetic oil can degrade over time. For vehicles driven primarily in extreme climates or for short urban journeys, many specialists recommend more frequent changes.

Oil Consumption Note

High-performance engines like the 6.0L W12 may consume a small amount of oil between services, especially during the initial running-in period. Factors such as driving style, oil quality, engine RPM, and ambient temperature can influence consumption rates. Owners should check their oil level periodically and use the correct oil for top-ups as specified in their owner's handbook.

Spark Plug Timing

Replacement Interval

Spark plugs are a significant service item on the Continental GT Speed Convertible. The W12 engine requires a full set of 12 spark plugs. Replacement is typically included in the 4th Annual (Major) service at 40,000 miles .

Documented service records for the 2014 model show spark plugs being replaced at appropriate intervals as part of regular maintenance . Given the high-performance nature of the W12 engine, adherence to the factory-recommended replacement schedule is essential for maintaining optimal ignition performance, fuel efficiency, and engine health.

Brake Fluid Recommendations

Fluid Specifications and Service Interval

The 2014 Continental GT Speed Convertible uses DOT-4 brake fluid.

• Inspection: Brake fluid level and condition should be inspected at every scheduled service.
• Replacement: A conservative approach is to flush and replace brake fluid every 2 years, as brake fluid is hygroscopic and absorbs moisture over time, degrading braking performance. A documented example shows brake fluid replacement as part of a February 2026 service on a 2014 model .

Brake Component Inspection

The Continental GT Speed Convertible's substantial weight and performance capability place significant stress on braking components. Brake pads, discs, and fluid should be inspected at every service. Documented service records for the 2014 model show front brake pads being replaced as part of routine maintenance .

Coolant Service Timing

Replacement Interval

The cooling system is checked at every annual service for condition and proper protection levels. Coolant replacement is typically included in the 4th Annual (Major) service at 40,000 miles or recommended at 5-7 years, whichever comes first. Using the correct coolant is essential for preventing corrosion and maintaining proper heat transfer in the high-performance W12 engine.

Cooling System Component Inspection

With the 2014 Continental GT Speed Convertible now over 10 years old, cooling system components may require attention. Regular inspection of radiator, hoses, and connections during routine service is recommended to prevent cooling system issues.

Transmission Service

Transmission Specifications

The 2014 Continental GT Speed Convertible is equipped with an 8-speed shiftable automatic transmission . The vehicle features all-wheel drive .

Service Considerations

The requirement for a transmission fluid change depends on several factors. 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. Stop-and-go driving, spirited driving, or other high-stress conditions can shorten transmission fluid life.

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.

Service Documentation Importance

Maintaining a comprehensive service history is critical for preserving the vehicle's resale value and verifying its condition . Well-documented examples show:

• A 2014 Continental GT Speed Convertible with 21,000 miles had seven Bentley dealer service records from pre-delivery through 2020, including annual servicing at Birmingham, Newcastle, and Leicester Bentley dealers .
• A 71,000 km (~44,000 miles) example had seventeen documented service visits across twelve years, including valve cover gaskets addressed, spark plugs replaced at appropriate intervals, control arm bushings and wheel bearings renewed, front struts replaced, and recent brake fluid, front pads, and oil change .

The official owner's manual for the 2011-2018 Continental GT (part number 390 012 003 KB) provides the definitive maintenance schedule for this generation and should be consulted for vehicle-specific guidance .

Long-Term Ownership Considerations

The 2014 Bentley Continental GT Speed Convertible rewards diligent and proactive maintenance. Key considerations for owners include:

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. It is no longer compulsory to service a Bentley at a main dealer to maintain the manufacturer's warranty, provided the specialist follows the schedule and uses OEM parts.

Convertible Top Care

The power-folding soft top on the Continental GT Speed Convertible is a sophisticated mechanical and hydraulic system that requires specialist attention. The official owner's manual and service documentation should be consulted for proper operation guidelines .

Battery Maintenance

The Continental GT Speed Convertible's advanced electrical systems require proper battery maintenance; a trickle charger is recommended for vehicles not used regularly.

Tire Maintenance

With its power, torque, and all-wheel-drive configuration, proper tire pressure and condition are essential for safety and performance. Tire rotation is a standard part of the annual service .