Fossil fuels are definitely the most common form of fuels for vehicles. Diesel and even gas are the fuels most generally used. They might not be so green, but they’re definitely easy to obtain.
Unlike alternative fuels, most fossil fuels are readily available as stations everywhere. There’s very little danger of running out while you’re on the road. You can also shop for the best price, making it a good deal.
With alternative fuels, finding somewhere that sells it is very difficult as the choice is extremely limited and you don’t have the option of looking around for the best price.
Most production vehicles are set up for fossil fuels. It can cost a great deal of money to adapt then vehicles for alternative fuels, so using fossil fuels is much cheaper. Also, most mechanics can easily work on fossil fuel cars but not necessarily on alternative fuels.
To have a mechanic look at problems with alterative fuel vehicles can cost you plenty of money, much more than you’d have to pay for work on cars running on fossil fuels. Apart from the price, it’s simply much easier to stick with fossil fuels, as there’s no extra work involved.