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Mine is not a 1LE but I have 1LE rear end in my SS. I drove factory oil until 1000 miles then oil change to Pennzoil Platinum. Next oil change at 3000 and another at 6000. From now on going to run 6K between changes.
As far as break in first 500 miles did not beat on her or go over 4K rpm next 500 miles did get on her some and did not go over 5K rpm. After that drive her like a bat out of hell when I want to. Not burning any oil and catch maybe a 1/2 a tea spoon in catch can every 400 miles.
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