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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
See the answer on oil film strength. 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.