It has been stated that any oil can be used with the maintenance dose, and Max Life has been shown to be an excellent oil. The only thing that would discourage me is the fact that this is a "high mileage" oil. They usually contain seal conditioners/swellers, and I would wonder how they would react with the way Auto Rx cleans both sides of the seal. If it were me, I would probably use a "regular" dino motor oil and let Auto Rx use the host oil's add pack to do it's thing.
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2001 Ford Ranger, 4.0 V6. Mobil 1 0w-30, Motorcraft FL 820s filter, 3oz Auto Rx