How big is the fuel tank on a 1966 Ford F100?
The typical fuel tank capacity for a 1966 Ford F-100 is about 20 gallons (75 liters).
In practical terms, that figure applied to most standard pickups of the year, though exact capacity can vary depending on the truck's configuration such as bed length, engine choice, and any optional equipment installed by Ford or a fleet customer.
Typical capacity and configuration notes
Most 1966 F-100 models used a single, in-frame fuel tank mounted under the bed. The size stayed relatively consistent across the model line, but variations occurred with certain options and market configurations.
Before examining specifics, consider the main factors that could influence tank size on a 1966 F-100.
- Bed length and wheelbase: Short-bed and long-bed versions could have different space constraints, with some configurations favoring a standard 20-gallon tank.
- Engine and driveline: Fuel system design and fuel pickup placement were standardized, but different engines did not typically change the tank size dramatically.
- Option packages and fleet orders: Some heavy-duty or long-haul-focused orders could include larger tanks, though this was not universal.
- Regional or export models: Non-U.S. markets sometimes specified different tank sizes for compliance or logistics.
In practice, the standard configuration most people refer to is a 20-gallon tank, with potential exceptions based on the exact build sheet and regional specification. To confirm for a specific truck, consult the SPID/build sheet or inspect the fuel tank for any capacity markings.
How to verify the fuel tank size on your 1966 F-100
Use these steps to determine the exact capacity on your particular truck:
- Locate the SPID (factory option tag) under the hood, on the radiator support, or on the driver’s-side door jamb, and read the fuel-tank code.
- Match the code to Ford’s 1965–1972 F-Series SPID reference to identify the installed tank size.
- Check the fuel tank itself for any stamped capacity or model number that indicates gallons or liters.
- Consult the original owner’s manual or a Ford dealership service bulletin for the specific build sheet if the tags are unreadable.
With these steps, most collectors can verify the exact capacity for their 1966 F-100, which is helpful for maintenance and restoration accuracy.
Summary
The 1966 Ford F-100 commonly used a 20-gallon fuel tank, a standard size that applied to many configurations. Exact capacity can vary by bed length, option packages, and regional specifications. For a precise figure, check the truck’s build sheet or SPID tag, or consult Ford-era documentation or a trusted restorers database.
What year is the F-100 the most desirable?
Collectors still love early-model versions of the “Effie” for its classic styling and ease of modification with the 1953-1956 versions in high demand to this day.
What engine came in a 1966 Ford F100?
Powertrain
| Engine | Model Years | Power |
|---|---|---|
| 292 CID Y-block V8 | 1961–64 | 170 hp (127 kW) |
| 240 CID Straight-6 | 1965–66 | 150 hp (112 kW) |
| 300 CID Straight-6 | 1965–66 | 170 hp (127 kW) |
| 289 CID Windsor V8 (Mexico only) | 1965–66 | 160 hp (119 kW) |
How big is the fuel tank on a 1965 Ford F100?
18 Gallon
In Cab Gas Fuel Tank 18 Gallon 61-65 Ford F100 F250 Pickup Truck w/o EEC.
How much is a 1966 Ford F100 worth today?
Typically, you can expect to pay around $17,433 for a 1966 Ford F-100 1/2 Ton in good condition with average spec.
