It's funny watching you all use different words and think they mean the same thing. Turbine powered aircraft, whether jet, fan or prop (a Citation is a turbofan powered aircraft) use Jet-A which is basically diesel (OK, OK, it's kerosene but they aren't that different). Piston planes (of which there are plenty) mostly use 100LL - high octane, leaded gasoline. Now that we're done with the pedantry, please continue with your argument.

Yes, if you change entire words in my post you can make it say anything you like.

Parent talked about private planes which you changed to talk about specifically private jets which doesn't disprove "many planes" using leaded gas.

Direct quote from the parent: “ If you’re a wealthy politician with a private jet”

Jets don't