Dumped factory fill at 100 miles. Added 5w-30 Mobil 1 Extended 3.5 qts, 1 qt Redline 0w-40. Fram Ultra. Ran 1,000 miles with heavy foot, short trips. Gained 1/8 qt of oil, checked oil in the morning after sitting all night, car in the same place. Oil lab largest CAT dealer in Minnesota, but not setup for fuel dilution for gas engines.
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