100 low-lead is aviation gasoline. It's fine to run in vehicles (up for debate according to some) just make sure you get hardened valve seats when you get new valves.
FWIW.... Only worry about the hardened seats for regular pump fuels, not for 100LL AVGas. 100LL has MORE lead in it than leaded automotive fuels ever had; 100LL is 'low lead' only in reference to the older lead AVGas.
