I have treated the cylinder of each of my generators with Sta-Bil Fogging Oil treatment after every run, before putting them away for storage, by removing the spark-plug and spraying in the Sta-Bil, putting a rag over the spark-plug hole and pulling the rope a few times, and then reinstalling the same spark-plug, and slowly pulling the rope and stopping on compression so the valves are closed and the valve springs are in minimum compression. Both of my generators have aluminum heads. You have to snug them some, but not go gorilla tight on them. If I knew what torque to use to re-install them I would use a torque wrench. I have 1/4 ", 3/8", and 1/2" drive torque wrenches. I also have extensions with locking ends so the spark-plug socket will not come off and be stuck in the well. When I was a kid we had a rowboat with a 5.5 HP Sears Ted Williams outboard. That thing ran gas mixed with a lot of oil, and was prone to fouling the spark-plug. My brothers and dad and I had to remove the plug from that many times and eventually after several years stripped the aluminum threads. We helicoiled it, and also bought a spare head. But by then we all learned not to over-tighten the spark-plug and never had to use the spare head.
But Vladiator, you have a good point, I will have to remember that the heads on the CR-V are also aluminum.