Has anyone ever thought of it? It occurs to me that turbos share the same oil as the engine because it's convenient, but does it have to be that way? Couldn't there be a better way? Perhaps sealed bearings? Or a separate oiling system? Maybe some specific lubricant just for turbos - possibly even grease. I mean - there are diffs that use a different lubricant than the same transaxle, so why not a turbo?
You're basically dealing with a system that could be sealed and wouldn't otherwise be subject to contamination. Most are also water cooled, so oil wouldn't necessarily be needed to cool the bearings if the flow of coolant is increased. I keep on hearing about turbos that were oil starved because a screen got plugged up or where the oil used was insufficient to protect the turbo.
You're basically dealing with a system that could be sealed and wouldn't otherwise be subject to contamination. Most are also water cooled, so oil wouldn't necessarily be needed to cool the bearings if the flow of coolant is increased. I keep on hearing about turbos that were oil starved because a screen got plugged up or where the oil used was insufficient to protect the turbo.