I have 3 MVs and two trailers and more nipples than a coon hound nursing a litter of pups.
I used to buy the prefilled tubes... but that got expensive QUICK. I currently do the 'suction fill' method where you plunge the barrel into the grease to fill it up... messy, wastes a lot of grease and time.
I just ordered this:
Zee Line Grease Filler Pump, Model# 328
Item# 109020
http://www.northerntool.com/
I can't post a link to the item.... its session based and gives an error.
Cost to the front door was $52. The math:
A 5 gallon pail of CG-LB NGLI #2 grease is about $100 from NAPA.
Figure a 14oz tube is $5
35lbs * 16oz/lb = 560oz / 14oz/tube = 40 tubes * $5 per tube = $200
So for $152 I am getting $200 worth of grease. ($152 because grease + pump vs 40 tubes of grease)
Next pail I should save even more.