First engineering question is, what is it and how do you wish to use it? What
condition is it in?
Modern highly finished, narrow tolerences in manufacturing, engines have
different lubrication requirements to older, heavier and less accurately
manufactured engines.
Oil still remains the basic ingredient that keeps the moving parts seperated,
cooled and washes away the fuel and incomplete combustion residues. Also it
removes the metal bits from bearings, rings and other friction surfaces.
Newly machined and assembled engine components have a much different
lubrication requirement to 'run in ' motors and different again to worn engines
with excessive clearances.
Running in involves grinding or wearing in of all the 'rough' surfaces of new
mating components. Old days practice was a bedding or running in period with
one oil and then convert to normal operation temperature, revs and load
situation. Engineering finishes are specified as certain textures or roughness
and although they may look smooth they are in fact best described as less rough.
Racing guys use linishing as bearing surface finishes but textured surfaces for
cylinder walls and cast ring faces
My advice read the PENRITE OILS webpage as it specifically requests you to
nominate you type of Healey before recommending their oil. The design their
oils for our style of car
Joe
----- End forwarded message -----
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