You are correct, although it's a great idea to pick up an extra gallon (of each) in case you need to top it off.
Edit: read this short thread: http://forum.e46fanatics.com/showthread.php?t=735677
OTOH, I've never seen anything posted on e46f that was intelligent enough to re-post here. There's a first for everything!
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Last edited by goosefoot33; 10-05-2012 at 11:54 AM.