|
Will: The synthetic oil won't help in the situation KT described since it is all the carbon coating the sliding mechanism which is causing the problem here -- synthetic will sure help the first one though - shutting down while the turbo is still too hot causes the dino oil to cook off leaving the bearings unprotected. The synthetic, having a higher boil point, shouldn't cook off as badly thereby giving the bearings some lubrication. Still not a good idea to shut down hot -- but with these new engines you can never get the EGTs down low enough it seems without excessive idling -- then you get the problem KT describes -- all kinds of carbon coating the turbo vanes since the engine isn't running hot enough to burn it off. Catch 22 it seems.
Regardless, in the case of the Dodge engine, all of the diesel techs I've spoken with have recommended running with the 'Exhaust brake' on at all times (this forces the variable vane turbo to cycle) to keep it cleaner. Too bad Chrysler didn't / doesn't make that the default instead of having the driver turn it on every time you start up. However, that is another issue and I don't mean to hijack this thread.
|