In a 'Pivotal' engine the only components subject to wear are
the chamber surfaces, the compression seals and the bearings.
Modern surface coating technology provides a wide range of material
choices making it possible to achieve the service life required
in almost any engine application.
By pivoting the piston we have removed the high lubrication demand
that is associated with the sliding piston of a conventional two/stroke
engine (the cause of excessive oil loss out of the exhaust). Oil
can be metered by the engine management system directly to the
surfaces of parts where it is needed. The
'Pivotal' engine oil usage is only 10% of the level required by
a conventional two/stroke engine. This rate of oil consumption
is comparable with the oil consumption of a four/stroke engine
before the additional saving from not having oil changes is factored
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