Can you convert used transmission fluid to diesel fuel?

It is not possible or advisable to convert used transmission fluid into diesel fuel. While it is true that diesel fuel is a hydrocarbon-based fuel, that does not mean that every hydrocarbon can simply be converted into diesel. Transmission fluid is specifically designed to lubricate and cool the gears and bearings in a transmission system and contains a variety of additives to perform this function. These additives may not be compatible with diesel fuel and could cause damage to your engine.

Additionally, used transmission fluid is often contaminated with metal shavings, dirt, and other debris that could clog fuel filters and injectors. Furthermore, the chemical composition of used transmission fluid is substantially different from that of diesel fuel, and attempting to use it as a fuel could lead to engine failure or other serious problems.

Therefore, it is strongly advised to use only high-quality diesel fuel from a reputable source. Do not attempt to convert used transmission fluid or any other fluid into fuel.