Yes. Since 1930++ they have been going for better mileage. The R
& D is ahead by many major oil companies. Their goal and
technological advances is what enables them to be No:1 till today.
The quest for better mileage is never ending until alternate source
of fuel is found. Like Methanol , they even got methanol stations
already. Very few but yeah.. shows where they are looking at in the
future.
The additives are very strictly regulated. Not just globalised but
in terms of compliance to car manufacturers around the world on
their engines and how it performs. I skip the technical details but
to answer ur question , yes. They are the same.
