A rig test to measure friction and wear of heavy duty diesel engine piston rings and cylinder liners using realistic lubricants.
http://web.ornl.gov/~webworks/cppr/y2005/pres/117987.pdf
Using ring and liner sections on a reciprocating bench at temperatures up to and including 100C, the authors measure wear of both ring and cylinder liner segments, by volume and mass.
Four different lubricants used, Jet A1, Mineral oil unadditised, and 15W40 both new and used.
The used oil comparison is good because papers are a little rare on that topic.
Again, this is another paper that demonstrates that the used oil produced significantly less wear than the new oil...
http://web.ornl.gov/~webworks/cppr/y2005/pres/117987.pdf
Using ring and liner sections on a reciprocating bench at temperatures up to and including 100C, the authors measure wear of both ring and cylinder liner segments, by volume and mass.
Four different lubricants used, Jet A1, Mineral oil unadditised, and 15W40 both new and used.
The used oil comparison is good because papers are a little rare on that topic.
Again, this is another paper that demonstrates that the used oil produced significantly less wear than the new oil...