If you want to prevent your vehicle from rusting then Flui Film is the way to go.
Higher quality than Oregon for a reasonable price, lasts longer. Buy in bulk.
Great saw, I've had it a few years, very reliable. I mainly use it for dropping trees and then bucking. Open up the muffler and it pulls like a mad beast. Saw Suppliers is a great company to deal with, I'm not sure of its size, but fair prices and personal service like a Mom & Pop shop that cares.