How big is the gas tank on a 1978 Corvette?
The gas tank capacity is 20 US gallons (about 76 liters).
For context, the 1978 Corvette belongs to the third-generation C3 lineup, a period when fuel tanks were sized to balance performance with the era’s emissions rules. The 20-gallon figure appears in factory specifications and owner resources, and it shapes how often drivers would refuel under typical mixed driving conditions.
Official capacity and design context
The 1978 Chevrolet Corvette, produced amid the late 1970s era of American performance cars, was equipped with a fuel tank listed at 20 US gallons (roughly 76 liters) in factory documentation. This capacity was characteristic of the period’s Corvette models and was chosen to provide reasonable range without compromising under‑body clearance, weight distribution, or compliance with emissions standards.
Practical implications for drivers
With a 20‑gallon tank, the driving range depends heavily on driving style, road conditions, and fuel economy. For the 1978 model year, real-world mileage typically fell into the mid‑teens mpg range under mixed driving, translating to an approximate range of about 250–300 miles (400–480 kilometers) on a full tank. It’s also worth noting that aging fuel gauges and sending units can introduce discrepancies between the gauge reading and actual fuel level as the car ages.
Notes for restorers and collectors
For those restoring or preserving a 1978 Corvette, the 20‑gallon capacity is a benchmark in original parts catalogs and service manuals. When replacing a tank, aftermarket units are generally manufactured to the same 20‑gallon specification to preserve original range characteristics and weight distribution, although slight dimensional variations can occur between suppliers.
Summary
In short, the 1978 Corvette carries a 20‑gallon (about 76 liters) fuel tank, a figure that defined its range expectations in the late 1970s and remains a key reference point for enthusiasts and restorers today.
What is a 1978 Corvette worth today?
The value of a 1978 Corvette varies significantly, but a common price for a good condition car is around $16,450, while average retail prices are about $17,500. Prices can range from a low of about $5,775 for cars needing major work to a high of $54,000 for rare, perfectly maintained examples. The final value depends on factors like condition, mileage, specific features, and the presence of the limited-edition Indy Pace Car model.
Factors affecting value
- Condition: A well-maintained and original car will be worth more. Poor condition, extensive maintenance needs, or accident history will significantly decrease value.
- Mileage: Lower mileage generally results in a higher value.
- Features and options: Special editions, like the 1978 Indy Pace Car, are typically more valuable due to their rarity and special features.
- Desirability: The "Pace Car" model, with 6,502 units produced, is a highly sought-after variant and often sells for more than the standard coupe.
- Market trends: The current market and specific auction or sale results also play a role in determining the final price.
Price examples
- Low end: As low as $5,775 for vehicles with major issues or title problems.
- Average: A good condition car with average specs is around $16,450, with an average retail value around $17,500.
- High end: Exceptionally well-maintained examples with rare features can sell for $54,000 or more at auction.
- Market examples: You can find a wide range of prices listed, from under $10,000 for cars needing significant work to over $30,000 for cleaner, more desirable models.
How many gallons of gas does a C3 Corvette hold?
The fuel tank capacity increased from 17 gal to 24 gal on all cars. To make room for the larger tank, a smaller (P195/80D15) space saver spare tire was utilized.
What was the worst year for the C3 Corvette?
1982 Corvette Collector Edition
The C3 Corvette was amidst its death throes during the 1982 model year. In its 15th year of production, it had few fans left and open derision was the norm among enthusiasts. The C3 had overstayed its welcome by at least five years.
How big is the fuel tank on a 1978 Corvette?
24 gallons
A larger, plastic-lined fuel tank is also a new addition to the '78 Vette. Capacity has been boosted from 17 to 24 gallons.
