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mike100 · 07-30-2013

DOT3 can take higher percentage of water contamination, DOT4 has a higher boiling point, but should be changed more often. I know my C6 specs DOT4 for the clutch slave, but i use DOT3 in my C4 because I had a lot of it around the house. It works great- mainly having new, clean fluid is a plus. A pint of DOT4 is cheap- consider it a flush fluid in case you ever find the GM stuff.

07-30-2013	#6
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Clutch fluid replacement DOT3 can take higher percentage of water contamination, DOT4 has a higher boiling point, but should be changed more often. I know my C6 specs DOT4 for the clutch slave, but i use DOT3 in my C4 because I had a lot of it around the house. It works great- mainly having new, clean fluid is a plus. A pint of DOT4 is cheap- consider it a flush fluid in case you ever find the GM stuff.