What specific saws do you have besides the 041?
The sprockets need to have the same spacing (pitch) too, not just the number of slots or teeth. There is a big difference between .325 and .375 (3/8) pitch.
But yes, you should be able to run both saws with the same chains. I standardized on 20", 3/8 pitch, .050 gauge, 72 drive link chains for both my MS-460 and my 041 AV. Both bars and chains were interchangeable. I also have a Husky 394 with a Husky 20" bar that takes the same 72 drive link, 3/8 pitch chain as the Stihls.
Be aware not all bars are created equal. My Husky 55 Rancher had small mounts and other bars (Stihl) were not interchangeable with the Husky. They were both 3/8 pitch, .050 gauge, and both could use the same chain with 72 drive links. I elongated the bar slot on my longer Stihl bars and bought the adapter that allows me to use those bars on my Husky 394.
All my saws have 7 tooth, 3/8 pitch sprockets.
Can't help with the oiler question.