
With the average U.S. gas price around $3.50 per gallon, $300 buys approximately 85 gallons of gas. The cars that can effectively "take" this value are those with the largest fuel tanks, particularly full-size SUVs and trucks. However, the real metric you should care about is driving range—how far you can drive on that $300. A vehicle with a large tank but poor fuel economy will waste that capacity, while a fuel-efficient model with a moderately sized tank will get you much farther.
The top contenders for maximizing range are diesel-powered vehicles and modern hybrids. For example, a Suburban has a massive 28-gallon tank, but its 20 MPG combined rating gives it a range of about 560 miles. In contrast, a Toyota Prius has a much smaller 11-gallon tank. Yet, thanks to its excellent 50+ MPG efficiency, it can travel over 550 miles on a single fill-up, making your $300 go just as far in terms of distance while spending less per tank.
If your goal is to literally spend $300 in one go, you'll be looking at vehicles with tanks that hold around 28-34 gallons. This is almost exclusively the domain of heavy-duty pickup trucks and large vans.
| Vehicle Example | Fuel Tank Capacity (Gallons) | Approx. MPG (Combined) | Est. Range on One Tank (Miles) | Est. Cost to Fill from Empty (at $3.50/gal) |
|---|---|---|---|---|
| Ford F-250 Super Duty (Gas) | 34 gal | 17 MPG | 578 miles | $119 |
| Chevrolet Suburban | 28 gal | 20 MPG | 560 miles | $98 |
| Toyota Tundra (38-Gal Tank) | 38 gal | 19 MPG | 722 miles | $133 |
| Ram 3500 (Diesel) | 50 gal | 19 MPG | 950 miles | $175 |
| Toyota Prius | 11 gal | 52 MPG | 572 miles | $38.50 |
| Ford Transit 250 Van | 25.4 gal | 16 MPG | 406 miles | $88.90 |
Ultimately, if you need to use a $300 gas card, you'd need to buy multiple fill-ups for almost any vehicle. For the longest distance from $300, choose a fuel-efficient model like a hybrid.

You're thinking about this backwards. No normal car has a tank that costs $300 to fill. A big truck like an F-250 might cost around $120 to fill up. The real question is how far that $300 will get you. My advice? Get a fuel-efficient car. A Civic will travel over 1,200 miles on $300 worth of gas. A gas-guzzler might only get you 600 miles. Your wallet will thank you on every trip.

As a dad who does a lot of road trips, I focus on range. My Highlander Hybrid has a tank that costs about $50 to fill, but I can drive nearly 600 miles before stopping. That's the freedom you want. Spending $300 in one shot isn't practical; it's about how many miles you get for your money. Look at the official EPA-estimated MPG and multiply it by the tank size to find the car with the best range for your needs.

Practically speaking, you can't pump $300 of gas into a single passenger vehicle in one transaction. The pump will shut off when the tank is full, which for even the largest SUVs is well under $150. The only way to use a $300 gas card is over multiple fill-ups. Instead of looking for a huge tank, focus on a vehicle with high MPG to maximize how far that $300 takes you. A hybrid or a modern diesel is your best bet for maximum mileage.

I drive a lot for work, so I did the math. At today's prices, $300 is about 85 gallons of gas. To use that much in one go, you'd need a commercial vehicle, like a large box truck or a motorhome with a 100-gallon tank. For daily drivers, it's not feasible. The smarter strategy is to pick a car with a great highway MPG rating. My Seltos gets me over 400 miles on a tank, and that $300 lasts me for months of commuting instead of a couple of long hauls.


