Do you know about the Federal law restricting using leaded fuel of any type on any public U.S. roads, freeways or highways in all of the U.S.? If not be aware of it, it carries a $10,000 for the first offence
I can tell you that every law enforcement agency in California that I've talk to or heard about are aware of it and they know the local courts get to keep all of the fine money from that citation
I was warned by a San Bernardino County sheriff about that back n the 1990s when he saw one of my old race cars with current tags at the old LACR race track, he assumed I drove it on the street regularly, which I hadn't done in his presents at that time, he was a drag racer also The smell gives it away