You used to be able to buy leaded 110 gas as Sunoco in the early 2000's. It would make your exhaust tips turn white and had a sort of candy like smell when combusted.
https://www.smithsonianmag.com/arts-culture/sugar-of-lead-a-...
https://petroleumservicecompany.com/sunoco-supreme-112-octan...
I think they only sell the unleaded race gas at the pumps now but I may be wrong.