Quote:
	
	
		| 
					Originally Posted by urban_legend
					
				 Best game plan - have it professional flushed. I have tried twice and can only get about 2 gallons out. So some coolant seems to always remain in the system. | 
	
 
Just be sure you take it to a place that understands Porsche's require special fluid, not garden variety antifreeze.  You don't want to end up with oatmeal in your engine b/c someone made a mistake.