in my 15 years as a mechanic, nearly every single turbo engine i've seen with 150k+ needed the have the engine yanked out and every seal replaced so it was not pissing oil. positive pressure in the crank longterm will do that. if you own a turbo you better keep your oil clean and keep a eye out for leaks. let it warm up when it's cold, and let it idle for a minute when it's hot before you shut it off. in addition adding parts to a engine will cause more problems.    well we will see in 10 years when my 89 f250 is still cruising and yours is not.
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