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    Friend's Sludge Monster

    My Friend (Ok he's my only real oil nut buddy) was using Mobil 1 SS extended drains, then for some ungodly reason he decided to switch to Castrol Syntec and do the same extended drains. Now his 1996 Buick Century with 3.1 V6 with 88K, looking in his valve cover there is a lot of sludge. Its...
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