Why does the crank spindle need grease?

Per Cannondale step #5
SISL2 HOLLOWGRAM ROAD CRANKSET INSTRUCTIONS

I have a cannondale and put grease on the spindle I think if anything it is to help it slide through the bearing. Any grease should be fine.

Thanks

Help prevent galvanic corrosion between the spindle and bearing race.
Makes insertion easier as well.

---

I talk a lot - Give it a listen: http://www.fasttalklabs.com/category/fast-talk
I also give Training Advice via http://www.ForeverEndurance.com

The above poster has eschewed traditional employment and is currently undertaking the ill-conceived task of launching his own hardgoods company. Statements are not made on behalf of nor reflective of anything in any manner... unless they're good, then they count.
http://www.AGNCYINNOVATION.com

I personally use marine grease for the BB spindle and bearings. I have been doing this for two years now and am happy with the results. The general theory of marine grease is increased hydrophobicity. On the spindle this is not really a concern, but for the BB30 bearings that is my go to grease. I also use marine grease for the headset bearings, and speedplay pedals. It's so cheap and the results have been exceptional.