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All internal combustion piston engines burn some oil. Oil is typically splashed on cylinder wall and squirted on valve stems. In both cases the purpose is to create a film of oil between moving metal surfaces. In the cylinder, the film also acts to enhance sealing against compression losses. There is always some oil residue on the cylinder wall after piston rings have swept away excess oil. This usually burns and appears within exhaust gases. Some oil residue remains on the valve stem and is also caught up in exhaust gases. In either case the amounts should be quite small. Usage of half a quart or less is not unusual between oil changes on the older hondas of my experience. I leave to the experts here to tell us about the nsx.Additional seepage may be experienced around bearing seals, but this is minimal in a properly functioning bearing with seals. All of these functions result in some loss of lubricant, but it is small in an engine that does not have a malfunction, excessive wear or is purposely design with loose tolerances. Anyway you cut it, within the appropriate execution of a given design there is an expected loss, ... even if it is small.anvil [This message has been edited by anvil (edited 14 July 2002).]
All internal combustion piston engines burn some oil. Oil is typically splashed on cylinder wall and squirted on valve stems. In both cases the purpose is to create a film of oil between moving metal surfaces. In the cylinder, the film also acts to enhance sealing against compression losses. There is always some oil residue on the cylinder wall after piston rings have swept away excess oil. This usually burns and appears within exhaust gases. Some oil residue remains on the valve stem and is also caught up in exhaust gases. In either case the amounts should be quite small. Usage of half a quart or less is not unusual between oil changes on the older hondas of my experience. I leave to the experts here to tell us about the nsx.
Additional seepage may be experienced around bearing seals, but this is minimal in a properly functioning bearing with seals. All of these functions result in some loss of lubricant, but it is small in an engine that does not have a malfunction, excessive wear or is purposely design with loose tolerances.
Anyway you cut it, within the appropriate execution of a given design there is an expected loss, ... even if it is small.
anvil
[This message has been edited by anvil (edited 14 July 2002).]
