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Yes anything running a northstar engine is prone to oil leaks especially if you use a synthetic oil this is because the block is made from aluminum which is more porous then steel so fluids can get past the seals in an effort to fix this gm started pressurized molding in 2000

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Q: You have 1997 ElDorado with an oil leak coming from who knows where A mechanic said these cars have a reputation for manifold oil leaks True?
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