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If you find oil in turbo hoses or intercooler, (1) check and repair crankcase ventilation as per 700/900 FAQ, (2)take out and clean inside oil drain pipe under turbocharger (important, but easily done with a solvent like PurplePowewer), run Mobil 1 fully synthetic motor oil from now on. Until I did all three, I used to drain half a pint of oil from the intercooler every few months. Since then, I haven't seen any oil at all in turbo hoses or intercooler in five years with a 20 year old engine and 10 year old turbocharger.
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