Learn how to lubricate the Marlin 336 lever action rifle from a professional gunsmith from Brownells. Videos are the best platform for learning how to do just about anything. I’ve read many firearm manuals and videos are just 100 times better.
Some of the better lubricants that I have used on firearms are Breakfree CLP, Rem Oil, Hornady One Shot, M-Pro 7 LPX and Hoppe’s Synthetic Gun Oil. It’s also a great idea to have a set of gunsmith screwdrivers. You can buy a small set for about $12.