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Oil film strength of Mobil 1™ compared with Royal Purple

“Does Mobil 1 have less oil film strength than Royal Purple? I have seen many times the friction test of oils using the machine that tests the oil film, test result shows that Royal Purple has more friction protection that Mobil 1 does, seeing these results makes me think that Mobil 1 is lacking some benefits, therefore Royal Purple has the better protection of all.”

 

Guillermo Tristani, Miami, Oregon

Answer

There are certain oils in the market today that use EP (extreme pressure) additives in their engine oil that are really designed for gear oils and not engine oils. Extreme pressure additives are typically not used in engine oils for a number of reasons, but the most important reason is that they can cause engine corrosion over time. The rigs being used in these demonstrations are primarily designed for industrial applications like gear oils where extreme pressure is a necessary and important performance feature. These demonstration rigs have very little to do with modern engines, which is why market leading oils in the industry perform poorly in these tests.

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