About oil consumption

[Gilles Gour]

Made a stupid calculation error in a previous post (dont remember the
title of the thread). Mixed city/highway driving would give
aroud 20,000,000 power strokes and not 900,000,000 strokes like i wrote.
But the main point is still : if 1 millionth of an once of oil(cylinder
wall oil) is burnt at every power stroke this would add up to 20 ounces
of oil for 5,000 kilometers.

 

[Jim Stewart]

Made a stupid calculation error in a previous post (dont remember the
title of the thread). Mixed city/highway driving would give
aroud 20,000,000 power strokes and not 900,000,000 strokes like i wrote.
But the main point is still : if 1 millionth of an once of oil(cylinder
wall oil) is burnt at every power stroke this would add up to 20 ounces
of oil for 5,000 kilometers.

It sort of goes along with what I was taught
many years ago. All cars burn oil. If they
don't appear to burn oil, it's because gas or
water is taking the place of the burned oil.

 

[Edward Hayes]

I seem to remember that many years ago an article was written that gave the
results of the amount of oil consumed(burned) in an internal combustion
engine running at 1/2 load. The tests were preformed by the US military and
supervised by General Motors Corporation. In a well designed internal
combustion engine with a bore/stroke ratio of 1 to 1 running a variable rpm
1/2 load cycle of 1500-4500 rpm. The good oil consumed number was less than
0.10 percent of the fuel consumed (gasoline). I am too laze to recalculate
the consumption but, I remember that for the Oldsmobile V8 the number was ~
one quart per 3000 miles. At that time Olds went to a 6,000 mile oil change
and the dipstick was changed to 2 quarts between full and add. eddie I would
like to see if that oil consumption number is reasonable today as
technology/material and superior machining should have improved. eddie

 

[Rick Courtright]

the consumption but, I remember that for the Oldsmobile V8 the number was ~
one quart per 3000 miles. At that time Olds went to a 6,000 mile oil change
and the dipstick was changed to 2 quarts between full and add. eddie I would

If I'm not mistaken, didn't that lead to a test protocol GM used for
many years after that called something simply like "the Oldsmobile test"
or similar indicating it was based on the Olds engine, which had been
chosen cuz it was particularly hard on oil? An old time engineer told me
about it, but I didn't pay enough attention at the time to remember well
today.

Rick