Quote: Only one supporter of the AMSoil but the graph shown is interesting, how does it stack up in an engine requiring zinc? A ball bearing test is one thing, what kind of real world comparisons exist?
Four-Ball Wear Test (ASTM D-4172) = Metal to metal contact, 132 pounds of pressure, 302 degrees Fahrenheit, 1800rpm, 1 hour duration.
Some believe the test doesn’t represent real world engine operation, while others consider it somewhat conducive to flat-tappet cam operation. It’s not THE test, but it’s A test to look at when considering motor oils. The Four-Ball Wear Test is an approved test by the American Society for Testing and Materials (ASTM).
I figured hemi471 would have chimed in by now. He likes Amsoil Dominator 10W-30 in his 528 Hemi.
