title_body: What temperature to froth/steam OAT milk to? {Rancilio Silvia}
upvoted_answer: I believe the PID setting at 280 F is set to control the boiler temperature. For steaming there may be another setting, but it's probably unnecessary - as long as steam leaves the wand you can steam your oat milk.
  
  I place my hand on the side of my metal jug to judge when I think my oat milk is steamed to perfection (I think I like it slightly cooler than most). I made myself an oat milk flat white just now and measured the final temperature at 58 C (136 F). I believe some may prefer it at up to 158 F, just like with cow's milk (there may even be some who prefer it slightly cooler).
  
  Regarding the 280 F setting, I'd recommend setting it to 205 F, tasting an espresso shot and if it's bitter go a little lower toward 195 F. If you taste sourness you need the boiler temperature hotter or, perhaps, to grind the coffee finer.