Antiseize- does it matter?
 

there seems to be a variety....aluminun, nickel, copper.

does it really matter what you use considering the small amount for each application?

It depends on the pressure and heat.

I've used aluminum in high heat(turbo bolts) and it kind of melted into a thin solid layer around the threads. The bolts came out but they were pretty challenging.

Copper I haven't ever had trouble with, but it's only slightly less expensive than nickle so....

Nickle is my preferred go-to. It's worth every penny.

This web site covers a lot of info about anti-seize. It's from "Never Seez" which is owned by Bostik.

Never Seez Products Overview - Industrial Supply Group is a Distributor of the full line of Never-Seez products

Rgds,
Chris W.