Which is the boy?
You can be sure of SHELL
At first glance you would think they
were all girls. Look again and you will
see that the one on the left is a boy.
Petrols look the same, but Shell
has a distinction which is quickly re
vealed in use.
WHY SHELL SUITS THE MODERN
ENGINE. All motor spirit consists of atoms
of hydrogen and carbon. In ordinary petrol,
these atoms take the form of long chains, in
which formation they combine irregularly
with the oxygen from the carburettor. This
can produce rough running and "pinking"
in the modern engine. Shell rearranges
these atoms into compact groups by the
"re-forming" process. In this formation
they combine evenly with the oxygen.
Thus combustion is controlled and