19 Most Fuel Efficient Cars, Trucks and SUVs to Hit the Road in 2015

NEW YORK (TheStreet) - Gas prices are heading lower but that doesn't mean you should ignore fuel efficiency when buying a new car. 

No matter what kind of vehicle you're looking for -- car, SUV, pickup truck, station wagon, to name a few -- there's a best-of-breed fuel-efficient one for you. The 2015 fuel economy guide by the U.S. Environmental Agency and the U.S. Department of Energy rates the gas mileage of most vehicles in the U.S. and we highlighted which ones in each class do best. 

Below are the cars and trucks with the highest fuel efficiency for 15 vehicle categories from two-seater cars to minivans. There are ties in some categories. Check out the list to see which brands were the best of the lot, ranked lowest to highest. TheStreet left out purely electric cars. Some diesel vehicles were included in the list.

Chevrolet Express 2500 Conversion Cargo

Tied for first for cargo vans, General Motors (GM) 2015 Chevrolet Express 2WD 2500 Conversion Cargo van has a 6.0 liter, 8-cylinder engine and gets an average 12 miles to the gallon. It has a manufacturer's suggested retail price between $29,555 and $43,360.

GMC Savana 2500 Conversion Cargo

Also first, the 2015 GMC Savana 2500 2WD Conversion cargo van has a 6.0 liter, 8-cylinder engine and also gets an average of 12 miles to the gallon. It has a base price of $29,555.

Ford Transit T150 Wagon

In passenger vans, the 2015 Ford (F) Transit T150 Wagon van has a 3.5 liter, 6-cylinder engine and gets an average of 16 miles to the gallon. It has a manufacturer's suggested retail price between $32,100 and $35,350.

Chevrolet Colorado

For the small pickup truck category, the 2015 Chevrolet Colorado 2WD has a 2.5 liter, 4-cylinder engine and gets an average of 22 miles to the gallon. It has a manufacturer's suggested retail price between $20,120-30,785.

GMC Canyon

Also in the small pickup truck category, the 2015 GMC Canyon 2WD has a 2.5 liter, 4-cylinder engine and gets an average of 22 miles to the gallon. It has a base price of $20,955.

Toyota Tacoma

The 2015 Toyota (TM) Tacoma 2WD, the final truck in the small pickup category, has a 2.7 liter, 4-cylinder engine and gets an average of 22 miles to the gallon. It has a manufacturer's suggested retail price between $20,765 and $25,360.

Ram 1500 2WD (diesel)

The 2015 Ram 1500 2WD diesel standard pickup truck has a 3.0 liter, 6-cylinder engine and gets an average of 23 miles to the gallon. It has a manufacturer's suggested retail price between $25,060 and $49,730.

Mazda 5

In the minivan category, the Mazda 5 has a 2.5 liter, 4-cylinder engine and gets an average of 24 miles to the gallon. It has a manufacturer's suggested retail price between $21,240 and $24,770.

Toyota Highlander Hybrid

In the standard sport utility vehicle category, the Toyota Highlander Hybrid 4WD has a 3.5 liter, 6-cylinder engine and gets an average of 28 miles to the gallon. It has a manufacturer's suggested retail price between $47,500.

As well, the Highlander Hybrid 4WD LE Plus also gets an average 28 miles to the gallon. The manufacturer's suggested retail price on the LE Plus is $49,990.

Lexus NX 300h

The Lexus NX 300h takes the lead in the small sport utility category. The 2.5 liter, 4-cylinder engine SUV gets an average of 33 miles to the gallon. It has a manufacturer's suggested retail price of $47,500.

Audi A3 (diesel)

In subcompact cars, the Audi A3 has a 2.0 liter, 4-cylinder, turbo engine gets an average of 36 miles to the gallon. It has a manufacturer's suggested retail price of $29,900.

Ford Fiesta

Also in the subcompact category, the 2015 Ford Fiesta SFE FWD has a 1.0 liter, 3-cylinder turbo engine gets an average of 36 miles to the gallon. It has a manufacturer's suggested retail price between $13,865 and $20,945.

Honda Fit

In the small station wagon category, the 2015 Honda (HMC) Fit has a 1.5 liter, 4-cylinder turbo engine gets an average of 36 miles to the gallon. It has a manufacturer's suggested retail price between $15,525 and $20,800.

Honda CR-Z

For two-seater cars, the 2015 Honda CR-Z has a 1.5 liter, 4-cylinder engine and gets an average of 37 miles to the gallon. It has a manufacturer's suggested retail price between $20,145 and $24,140.

Scion iQ

In the mini-compact car category, the 2015 Scion iQ has a 1.3 liter, 4-cylinder engine and gets an average of 37 miles to the gallon. It has a manufacturer's suggested retail price of $15,665.

Ford C-Max Hybrid FWD

In the large car category, the 2015 Ford C-Max Hybrid FWD has a 2.0 liter, 4-cylinder engine and gets an average of 40 miles to the gallon. It has a manufacturer's suggested retail price between $24,170 and $27,170.

Toyota Prius V

In the midsize station wagon category, the 2015 Toyota Prius V has a 1.8 liter, 4-cylinder engine and gets an average of 42 miles to the gallon. It has a manufacturer's base price of $26,750 (2014 model).

Toyota Prius

And the most fuel efficient car is the Toyota Prius and the Toyota Prius C, in the midsize car and compact car categories, respectively. The 1.8 liter, 4-cylinder hybrid Prius has a manufacturer's suggested retail price between $24,200 and $30,005 for the 2015 model. The Prius C has a starting price of $19,080 for the 2014 model.

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-Written by Laurie Kulikowski in New York.

Follow @LKulikowski

Disclosure: TheStreet's editorial policy prohibits staff editors, reporters and analysts from holding positions in any individual stocks.

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