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James A. Hayes (not verified)    July 23, 2024 - 9:41PM

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I did the same thing with my 06 GMC Sierra Z-71 and I still change my oil every 3000 miles. I was told that by a GM mechanic who I know personally. He also told me to forget the cheap gas and run premium. So far he was right. 208576 miles and still tachs 5000 rpm when I haul my trailer uphill and no issues. Jim

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