1989 suzuki swift ran up to 60 miles per gallon
2008 tato nano ran up to 80 miles per gallon using an air compression engine
if the oil is warmed diesel cars can use filtered cooking oil called biodiesel that restaurants have used again and again in restaurants and can no longer use
its is rumored that cuba has converted much of its sugar into ethanol or alcohol to be used in cars that use gasoline when the soviet union stopped providing them with oil / gasoline
its also been guessed that when alcohol was illegal in america, the illegal alcohol (moonshine) sold that was made in homes were also used to fuel the moonshiners cars
average cars nowadays still only do 30+ miles per gallon even if they're hybrid electric cars
materials used in automobiles have to be light like
aluminum , plastic , lightweight steel, glass, rubber and carbon fiber
less weight means less gas used
weight of the lithium battery for hybrid cars still makes many new cars somewhat heavy
elon musk made the largest mass produced electric car called tesla
musk is trying to make a mass produced self driving car
right now its tesla has only auto pilot feature meaning driver has to have his hands on the steering wheel at all times
ford and gm plan to make a self driving in 5 years
tesla
investopedia