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Hi, I'm new to the forum but lurked for a few years. I wanted to share my B12 success. My wife drives a 2019 Hyundai Tucson with the 2.4 Theta II. We bought it with 19 miles. At 2000 miles I dumped the 5w-20 and started running PP 5w-30 and at some point started using Castrol Edge 5w-30. Always...