The forum folks below would be appalled at the things my dad did with his chainsaw. When my dad bought it used, it was already "antique." It was a good price (at the time) and he needed to cut trees, horrible weeds they are. Many would consider it sacrilege what he did with that expertly crafted, HEAVY, solid aluminum and steel, 1940s Homelite. Cheapest oil, cheapest gas, scratched at nearly every outing, without care or concern. Sharpened with a cheap Sears file, and poorly sharpened at that. That era of chainsaws was arguably the "golden age." The skilled machinests with the ability to craft such remarkable, beautiful, yet functional chainsaws, have long passed, and their skilset with them. Then, get this: when it was worn out, instead of having an expert restoration lovingly done, HE THREW IT IN THE TRASH and bought a cheap plastic chainsaw to replace it!
http://www.chainsawcollectors.se/phpbb3/viewforum.php?f=14&sid=dd5700359eebcbcd3efd7de8d0796329