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    Oil Recommendation for 2000 Chevy

    I am new to the forum and have been reading up on all the threads but wanted to validate, or not, my decision. I have a 2000 Chevy extended cab Z71 pickup that has 140k miles on it. I bought the truck in '01, with 10k on it, so have a complete maintenance history on it. It has had a Whipple...