Originally Posted By: Audi Junkie
Anyone have a link to Mobil 1's response to the IVa wear tests, seriously. Seems odd they surfaced at BitOG without one in-hand. Perhaps they would like us to craft one for them, since their own staff is pretty useless.
Here is info from M1 Ask Mobil website:
Rebut Amsoil's Wear Scar Testing
Being a customer of Mobil 1 since the mid-1970s, I have noticed a number of websites that assert Amsoil is better, such as the following: "20W-50 Mobil 1 Supersyn leaves a wear scar over 5 times that of the AMSOIL (0.454 mm for AMSOIL vs. 2.026 mm for Mobil 1)!... The Mobil 1 Supersyn 0W-30 leaves a wear scar 5 times that of the AMSOIL 0W-30 (0.374 for AMSOIL & 1.842 for Mobil-1)! Same thing goes for... Mobil 1 5W-30 at 0.667 mm Mobil 1 Supersyn 0W-30 allows for a 1.842 mm wear scar compared to the AMSOIL Series 0W-30 Severe Service which only allows for a 0.374 mm wear scar. That means, Mobil 1 0W-30 allows for 5 times the wear that AMSOIL 0W-30 does!" Although I would never run any oil as long as they do in some of these tests at 25,000 to 35,000 miles, I wonder if at shorter change intervals there would also be similar margins. Please put my mind at ease with verifiable, independent data that I am, in fact, doing the best I can by remaining a Mobil 1 customer.
-- Mike Jansen, Lakeway, TX
Answer:
See the answer on oil film strength [posted below]. Look beyond bench tests and look to the real world where Mobil 1 is recommended by OEMs (original equipment manufacturers) worldwide as original equipment in their vehicles.
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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 test 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, OR
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 is because 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 an important performance feature you need. These demonstration rigs have very little to do with modern engines and that is the reason that market leading oils in the industry perform poorly in these tests.