[QUOTE=jnormanh;1112495]I don't believe a quart of oil is unable to run back into the pan. For example, let's just round off the entire interior surface area to 20 sq ft. It's certainly not more than that. Hot oil is going to form a film of no more than .001". Do the math, that's .24 cubic inch., about a tablespoon.
Yes, there are some pockets around valves, a bit in the oil galleries, a few drops hanging here and there, but nothing approaching a quart.
What is normal. depending on the cylinder bore finishes, and rings used, is for many engines to consume some oil during the first few hours of operation, but many carefully built engines consume very little. And as far as break-in on a well built engine, I've watched new BMWs come off the assembly line. They roll onto a highly instrumented dyno where they are fired up for the first time. Total time is no more than five minutes during which time the engine is run up to max revs and maximum load. If all the sensor numbers look normal, it's ready to hit the road, flat out if desired.
Yes, there are some pockets around valves, a bit in the oil galleries, a few drops hanging here and there, but nothing approaching a quart.
What is normal. depending on the cylinder bore finishes, and rings used, is for many engines to consume some oil during the first few hours of operation, but many carefully built engines consume very little. And as far as break-in on a well built engine, I've watched new BMWs come off the assembly line. They roll onto a highly instrumented dyno where they are fired up for the first time. Total time is no more than five minutes during which time the engine is run up to max revs and maximum load. If all the sensor numbers look normal, it's ready to hit the road, flat out if desired.
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