In most cases, a 1986 Ford F-150 uses about 23 gallons in a standard single-tank configuration; if the truck is equipped with a second tank, total capacity can reach about 46 gallons.
The 1986 F-150 line offered both single-tank and optional dual-tank setups, with capacity varying by engine, cab style, bed length, and whether the model included an extra fuel reservoir. Below is a breakdown of the typical configurations and how they translate to gallons.
Configurations and capacities
The following summarizes the common fuel-tank configurations for 1986 F-150 pickups.
- Single-tank configuration: approximately 23 gallons (about 88 liters)
- Dual-tank configuration: two tanks, commonly 23 gallons each, for a total of about 46 gallons (about 176 liters)
Note: Exact capacity can vary by engine choice, cab and bed length, drivetrain, and whether the truck uses a larger or smaller standard tank as part of a specific option package.
Verifying the exact capacity for your truck
To confirm the precise tank capacity for a specific 1986 F-150, check the vehicle's specification label located in the driver's door jamb, consult the owner's manual, or contact a Ford heritage database or dealer with the VIN. Fuel-tank capacity is sometimes listed in the original brochure or the service manual for the trim and cab/bed configuration.
Summary
In short, most 1986 F-150s with a single fuel tank hold about 23 gallons, while dual-tank configurations offer up to roughly 46 gallons. Always verify for your exact truck configuration, especially if you have a custom cab, bed length, or aftermarket fuel-tank setup.