20K Mile Amsoil ASL 4 LAB Comparison

[TooSlick]

Pat,

Whenever you add fresh oil, you are diluting any contaminents by the same amount. So the wear metals would be significantly higher if no fresh oil were to be added. At what point in the drain interval you add this fresh oil should not matter.

Ted

 

[Pablo]

3MP

That's 3.2677 x 3.5433

 

[Jay]

Pablo, thanks for going to the trouble and expense of doing this test. There's lots of good info here.