I'm about to reach 5K on my first fill with Amsoil 5W30. Should I dump it, or test it and see if I can keep going? All the past OCI's were with M1 at 5K so the motor should be clean inside.
The reason I ask is that I have heard not to extend the first run with Amsoil.
The reason I ask is that I have heard not to extend the first run with Amsoil.