Any gas will deteriorate over time and the stabilizer helps to overcome this.
I know a couple of people that bought a gen from HF and they are pleased with them. My son has one fo the smaller ones that he has used for a long time, his wife has to have elec. to run her breathing machine and he takes it when they go out fishing in their boat, also used as a back up by her when the electricity goes out, and the 6500 unit goes down.
By the time you learn the rules of life
You're to old to play the game