Ford Flex
Data verified by Nick Marchenko, PhD
Proper oil maintenance is crucial for the longevity and performance of your 2009–2019 Ford Flex. This versatile vehicle offers four engine options, including the powerful 3.5L Ecoboost Turbo V-6 and the reliable Duratec 35 V-6. Depending on the engine, oil capacities range from 5.5 quarts to 6 quarts, with recommended viscosities of 5W-20 and 5W-30. Regular oil changes not only keep your engine running smoothly but also help maintain optimal performance.
In addition to oil maintenance, it's important to consider the coolant capacity of your Ford Flex. The 3.5L Ecoboost engines require 13.7 quarts of coolant, while the Duratec 35 engines need 13.2 quarts. Keeping an eye on both oil and coolant levels will ensure your Ford Flex operates efficiently and effectively throughout its lifespan.
Ford Flex Oil Capacity
| Engine | Oil Capacity | Viscosity | Coolant | Years |
|---|---|---|---|---|
| 3.5L Ecoboost Turbo Ecoboost 3.5L The 3.5L Ecoboost Turbo engine has a displacement of 3.5L V-6. The power output is 365 hp with a torque of 420 lb-ft. | 5.5 qt | 5W-20 | 13.7 qt | 2012, 2011, 2010 |
| 3.5L Ecoboost Turbo Ecoboost 3.5L The 3.5L Ecoboost Turbo engine has a displacement of 3.5L V-6. The power output is 365 hp with a torque of 420 lb-ft. | 6.0 qt | 5W-30 | 13.7 qt | 2019, 2018, 2017, 2016, 2015, 2014, 2013 |
| Duratec 35 Duratec 3.5L The Duratec 35 engine has a displacement of 3.5L V-6. The power output is 240 hp with a torque of 223 lb-ft. | 5.5 qt | 5W-20 | 13.2 qt | 2012, 2011, 2010, 2009 |
| Duratec 35 Duratec 3.5L The Duratec 35 engine has a displacement of 3.5L V-6. The power output is 240 hp with a torque of 223 lb-ft. | 6.0 qt | 5W-20 | 13.2 qt | 2019, 2018, 2017, 2016, 2015, 2014, 2013 |
Ford Flex – Frequently Asked Questions
How many quarts of oil does the Ford Flex take?
The Ford Flex oil capacity varies by engine: 3.5L Ecoboost Turbo: 5.5 qt; 3.5L Ecoboost Turbo: 6.0 qt; Duratec 35: 5.5 qt; Duratec 35: 6.0 qt. Always confirm the exact capacity for your specific engine before an oil change.
What type of oil does the Ford Flex use?
Oil viscosity depends on the engine: 3.5L Ecoboost Turbo, Duratec 35, Duratec 35: 5W-20; 3.5L Ecoboost Turbo: 5W-30. Check your owner's manual for the correct spec for your specific engine.
What is the coolant capacity of the Ford Flex?
The coolant capacity for the Ford Flex varies by engine: 3.5L Ecoboost Turbo: 13.7 qt; 3.5L Ecoboost Turbo: 13.7 qt; Duratec 35: 13.2 qt; Duratec 35: 13.2 qt. Use the coolant specification listed in the owner's manual for your engine variant.
What type of oil does the Ford Flex use?
The Ford Flex uses different types of oil depending on the engine. The 3.5L Ecoboost Turbo engines require either 5W-20 or 5W-30 oil, while the Duratec 35 engines typically use 5W-20.
How many quarts of oil does the Ford Flex take?
The oil capacity for the Ford Flex varies by engine. The 3.5L Ecoboost Turbo engines take either 5.5 quarts or 6 quarts, while the Duratec 35 engines also have capacities of 5.5 quarts or 6 quarts depending on the specific model year.
How often should I change oil in a Ford Flex?
It is generally recommended to change the oil in your Ford Flex every 5,000 to 7,500 miles, depending on driving conditions and oil type. Always refer to your owner's manual for specific guidance.
What is the coolant capacity of the Ford Flex?
The coolant capacity for the Ford Flex varies by engine. The 3.5L Ecoboost Turbo engines require 13.7 quarts of coolant, while the Duratec 35 engines need 13.2 quarts.
Does the Ford Flex need synthetic oil?
While synthetic oil is not mandatory for the Ford Flex, it is highly recommended, especially for the 3.5L Ecoboost Turbo engines. Synthetic oil can provide better protection and performance, particularly in extreme temperatures.
What happens if I use the wrong oil viscosity in my Ford Flex?
Using the wrong oil viscosity can lead to inadequate lubrication, which may cause increased engine wear and potential damage. It's important to use the recommended viscosity, such as 5W-20 or 5W-30, for optimal performance.
What is an oil life monitor and how does it work?
An oil life monitor is a system that tracks the condition of your engine oil based on various factors like mileage and driving conditions. It helps determine when an oil change is necessary, ensuring you maintain optimal engine performance.
Can I mix synthetic and conventional oil?
While it is technically possible to mix synthetic and conventional oil, it is not recommended. Mixing oils can reduce the performance benefits of synthetic oil and may lead to compatibility issues.
How do I know if my Ford Flex has an oil leak?
Signs of an oil leak in your Ford Flex include oil spots on the ground where you park, a drop in oil levels, or a burning oil smell from the engine. Regularly checking your oil level can help detect leaks early.
What causes excessive oil consumption?
Excessive oil consumption in your Ford Flex can be caused by worn piston rings, valve seals, or gaskets. It can also occur from using the wrong oil viscosity or poor engine maintenance.
Should I check my oil when the engine is hot or cold?
It is best to check your oil when the engine is cold, as this allows for a more accurate reading. If you check it when hot, let the engine sit for a few minutes to allow the oil to settle.
What is the difference between an oil change and a flush?
An oil change involves draining the old oil and replacing it with new oil, while an oil flush is a process that cleans the engine by removing sludge and deposits. Flushing is typically not necessary and should only be done if there are specific issues.