Japanese crossword «Auto»

The car's despoiled of its spoiler;
Your spoiler was a foil
to the lines I would have written
about the spark plugs and the coil
(it's air-cooled, so there's no coolant
that could overheat and boil,
but you still must check the pressure
in the tires, and the oil).
The pistons, made of metal
more massive than aluminum foil
are propelled back and forth
according to the law of Boyle
(not involved in that equation
is my friend Leonhard Euler,
who was not a handsome man,
rather more like a gargoyle;
and likewise there's no input
from Sir Arthur Conan Doyle,
nor from Gretzky, the ex-Oiler,
nor Prince William, the royal).