What Can Provide Significant “Long Term” Engine Protection, Even in Extreme Conditions?
Piston Domes (SEE PICTURES BELOW)
Significant “blow-by” occurred in
Engine B.
Engine A showed NO signs of “blow-by”.
It is clear that
Engine B did not get adequate protection. It appears the viscosity of the premium motor oil used by many racers did not provide the protection needed for the loads placed upon the engines.
It also appeared that the viscosity of the premium motor oil used by many racers thinned to a point where “blow-by” could occur. This showed a lack of engine protection for
Engine B.
Viscosity affects a motor oil's capacity to reduce friction and wear in ALL CAR ENGINES. As noted, the viscosity of the formula in
engine B did not produce the protection needed.
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Piston Domes
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| What happened: |
During the second session of the dynamometer test (engines operating at 100% load), noticeable blow-by was noticed from the value cover breather cap on the passenger side. |
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| Why did it happen: |
After inspection of the disassembled engines, we noticed that there was evidence of blow-by on the engine B piston domes, however, it did not appear that the piston rings were worn to the point that unburned fuel was getting past the rings. We feel that the wear was caused by the motor oil in engine B losing its viscosity. |
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| Why is this important: |
For optimum performance, an motor oil's viscosity must match the application. Viscosity affects a motor oil's ability to reduce friction and wear. |
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| Vehicle application: |
Thinning of a motor oil is more common in extreme conditions, such as auto racing, towing or any other application that would generate high RPM's or be put under significant load. |
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