My thoughts exactly....not sure exactly how abrasive cellulose is, some reports say it is, some say it's not...got to think engine components are harder but I haven't seen any data.
Just have never really read anything (other than probable propaganda) that says normal engine filtration systems are inadequate for superior engine life...not until you get into some pretty sophisticated systems on engines that are 24/7 usage where service interruption would be inconvenient.
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