Friction Reduction Capabilities of Silicate Compounds Used in an Engine Lubricant on Worn Surfaces

Table 3

Stabilized friction coefficient and wear scar diameter.

Test number	Duration in min	Types of balls	Engine lubricants	Stabilized friction coefficient	Standard deviations	Wear scar diameter (WSD), mm
1	60	New	Oil A	0.109	0.015	0.525
2	60	New	Oil A1	0.142	0.015	0.525
3	120	New	Oil A	0.098	0.009	0.650
4	120	New	Oil A1	0.131	0.015	0.600
5a	60	New	Oil A	0.109	0.012	0.660
5b	75	Balls used in test 5a	Oil A1	0.076	0.020