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Re: dealership overfilled my new truck's crankcase!
your cats can clog up super quick after a 6 quart overfill. The oil ends up in the cylinders, burns, and clogs the small areas in the cat, then it builds up with normal crap that should flow through, and before you know it, you need a $1500 y pipe, and don't try to skimp with the aftermarket cats, they hardly work (if you need to pass smog tests) and they clog up quicker than the stock ones.
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