lube

I shoot a Excaliber Exquinox and was wondering if you use rail lubrication, if so which brand, or not? I use the heavier string serving and have been using Scorpion Venom rail lube. I am torn as my serving seems to wear out fairly quickly and I have two buddies who have the same set up as me...

Then try this 55 gallons? I mean really? Who honestly buys that? Though I have to admit the reviews were hilarious.