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I'm the original owner of an '87 Buick Regal T-Type Turbo ("undercover" Grand National...), about 85,000 miles, engine AND turbo never apart and fully functioning. As a long-term "survival" method, NEVER shut the engine off immediately following a high-boost drive...let it idle and cool to normal op. temps BEFORE shutting it off. Otherwise, trapped oil in the turbo bearing area (hi-heat) may "coke" and shorten the bearing life...(not as crucial with water-cooled turbo systems, but still worth consideration).
Also, oil changes at shorter intervals are highly suggested, particularly if you often "drive it like you stole it..."
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