Most critically, liquid fossil fuels used in the world's vehicle fleet of cars and trucks can not simply be replaced with liquid biofuels. (scientificamerican.com)
Choose your preferred vehicle from the largest fleet in the industry and secure yourself a fully inclusive rate for a care - free holiday. (virginatlantic.com)
So, they better reflect today's vehicle fleet of more fuel - efficient vehicles and advanced technologies such as hybrids and turbocharged engines. (fueleconomy.gov)