Hi Justin--
Welcome to the Forum. Here is a link to show you what your new lens will do:
http://www.insightlighting.co.uk/HIRE/h ... hrow-1.pdfAs far as lubrication, there are a lot of opinions out there. I mostly use synthetics; for grease it's Grainger's version of the Dow Corning Molykote 33. I also have silicone spray, and 3 in 1 on my bench. Some use Mobil 1 motor oil, I've heard everything from 5W... to 10-30W. Zoom Spout Oil, too, is popular and readily available at Lowes or Home Depot. Try to get a lubrication chart for your specific projector as different parts of the machine require different lubes. Here's a link to a Bell and Howell repair manual; there should be a lube chart in there that can give you a general idea of what to use on what parts:
http://www.acofs.org.au/part_5_files/Be ... 0,2592.PDFBy the way, what machine are you working on? Good luck!