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Usage of motoroil
On 11 Jul 2003 04:07:47 -0700, (basskisser) wrote:
(Steven Shelikoff) wrote in message
snip the drivel and name calling
Now, are you going to tell us in what way does an engine lose the oil on
the cylinder wall during the power stroke in the combustion process if
it isn't burned?
Certainly.
snipped more of your drivel and name calling
Now, ever hear of a burned exhaust valve? If the rings are worn enough
to allow oil past them, and the exhaust valve is *slightly burned*,
the oil will push out of the valve on any stroke where there is
compression.
A burned, even slightly burned, exhaust valve is not the normal case on
a new engine. An engine where the exhaust valve makes a good seal when
closed will still burn oil. The rings will allow oil past them even
when brand new. But let's examine your example above.
You're saying that if the rings are worn enough, they will allow oil
past them. Nevermind the fact that this is always the case. So, the
rings are allowing oil past them into the cylinder. The compression
stroke comes along and you're saying that during the compression stroke,
the oil that is in the cylinder is going to be squeezed out past a
slightly leaky exhaust valve and will be "consumed" as far as the engine
is concerned. Right so far? Ok.
You do realize that not all of the "stuff" that's in the cylinder (in
this case, our air-fuel-oil mixture) gets evacuated during the
compression stroke, right? There is still some left in the cylinder at
the end of the compression stroke. So, in your example above, not *all*
of the oil that got past the rings will be forced out of the slightly
burned exhaust valve. Some will remain in the cylinder when that spark
comes and lights the whole mess off. What do you think happens to the
oil that didn't make it out of the slightly burned exhaust valve?
Now that we're done examining your one way of losing oil above, let's go
back to the way the technical reference described. Please answer the
question: In what way does an engine lose oil on the cylinder wall
during the power stroke in the combustion process if it isn't burned?
Your "answer" above doesn't cover that case. It only adds another way
for an engine to burn oil. Notice I said "burn", because oil that is
lost in the way you describe will be burned in the exhaust manifold.
Steve
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