If you're lucky enough to have a generator while your power is out, it's probably past time to change the oil.
These things are running HARD the whole time to power our shit, so it's definitely in your best interest to keep them maintained properly.
My 12000 watt portable recommends a change every 20 hours running. While you can most likely get away with longer, it's much cheaper to grab a couple quarts of oil than to replace your generator.
Also, if anyone else is like me and didn't know the difference between 10w30 and sae30... apparently 10w30 is rated for colder temps. Had to look that up this morning. The more you know 💫