ORIGINAL: downunder
Dar, you're playing with semantics to confuse the issue. Take the head off your car and look at the bores. Do they still have the cross hatching they had from new or are the bores polished? If polished, have you mistreated your engine?
Brian,
Most car engines, that have a cast iron cylinder block, or sleeves, will also have cast iron compression rings.
With the rings properly gapped, the wear on the sleeve's crosshatch pattern will be visible, but with the crosshatch made pretty deep, like with a Sunnen K machine, it will still be visible.
If this engine has the top ring chromium plated, the wear of the crosshatch may be more extensive.
With a molybdenum coated top ring, no wear will be visible on the crosshatch.
With a chromed sleeve, the crosshatch will be like new even after many thousands of kilometers have been accumulated.
With an ABC engine, I think this is the closest combination.
The high silicon aluminium (hyper-eutectic) piston is very hard, but it is still softer than the chromium on the sleeve.
I would expect, in a modern ABC engine, with the top 1-1.5 mm of the piston relieved, no measurable wear, but the piston more shiny just below the recessed portion (0.1-0.3 mm), following break-in. I would expect no visible wear on the sleeve.
In MVVS engines, which I deal with now, there is no crosshatch. The sleeve is just lightly sanded after machining is completed. So seeing wear in the crosshatch pattern is obviously not possible...