How much oil does a Ford Flex 3.5 take?
The Ford Flex's 3.5-liter V6 typically requires about 5.7 quarts of engine oil with a filter. If your Flex uses the 3.5-liter EcoBoost option, expect about 6 quarts.
The number depends on the exact engine installed in your Flex and model year. Below is a concise reference to the two common 3.5-liter configurations and their oil capacities, followed by notes on oil type and maintenance.
Oil capacity by engine variant
The Ford Flex used two 3.5-liter V6 configurations across its production years. The capacity varies by engine installed.
- 3.5L Duratec Ti-VCT V6 (non-EcoBoost): approximately 5.7 quarts (5.4 liters) of engine oil with a filter.
- 3.5L EcoBoost V6: approximately 6 quarts (5.7 liters) of engine oil with a filter.
Conclusion: These figures are typical values used by service guides and owner manuals. Always verify with your vehicle’s manual, the under-hood label, or your VIN-specific documentation for exact capacity.
Oil type and change intervals
Most Ford Flex models with the 3.5L engines specify a nominal oil grade of 5W-20, with 5W-30 acceptable in warmer climates or specific model years. Check the owner’s manual or the under-hood sticker for the exact specification and the recommended oil-change interval, typically every 5,000–7,500 miles depending on driving conditions and oil type.
Maintenance tips
During an oil change, replace the oil filter, use the correct oil capacity, and avoid overfilling. If you top off between changes, do so in small increments and recheck with the dipstick to maintain proper oil level.
Summary
In short: The Ford Flex's 3.5L engines generally take about 5.7 quarts of oil (with filter) for the Duratec version and about 6 quarts for the EcoBoost variant. Always confirm exact capacity for your year and engine type in the owner's manual or on the label under the hood, and follow the recommended oil type and change intervals.
