What is a drawback of using aviation gasoline mixed with jet fuel?

Using aviation gasoline mixed with jet fuel presents a significant drawback due to the formation of deposits on turbine blades. This issue arises because aviation gasoline has different combustion characteristics compared to jet fuel. When the two fuels are mixed, the combustion process may not be optimized, leading to incomplete combustion and the production of carbon deposits. These deposits can accumulate on critical engine components, such as turbine blades, obstructing airflow and potentially leading to performance problems.

As the deposits build up, they can cause an imbalance and may result in reduced efficiency and increased wear on the engine. Therefore, the formation of deposits is a key concern when mixing these fuels, making it the primary drawback in this scenario.