Although this is another ONE test of motor oil's ability to lubricate and withstand the load pressure from the metal parts it is in between, it shows how bad Mobil 1 0W-40 is in this department. Read it yourself from the link below.

This is just one piece in the oil puzzle but an important piece. Oil has many other functions this test did not test.

Royal Purple and Vavoline Durablend came up on the top. The cheap Penzzoil was better than many other expensive oils. LOL, BTW, these were all 10W-40 viscosities.

Let the war begin.

http://www.animegame.com/cars/Oil%20Tests.pdf

Saw it at BITOG site.