Putting diesel in a gas engine can cause several problems, but it probably wont destroy the engine. Here are some things that can happen:

• Fuel Pump: Diesel fuel is thicker and denser than gasoline, so the fuel pump will struggle to move the diesel/gasoline mixture through the system. This can cause damage to the fuel pump.

• Fuel Injectors: Diesel fuel can clog and damage a gas engines injection system and other components. If diesel reaches the intake system, it can potentially clog the fuel lines and damage the engine.

• Symptoms: If you put a small amount of diesel in a gas engine, it may still run and drive, but it will exhibit symptoms like difficulty starting, reduced power, emitting smoke from the exhaust, and potentially causing the catalytic converters to fail due to the excess unburnt fuel and particulates the diesel leaves in the exhaust.

If you accidentally put diesel in a gas engine, the first thing you should do is not start the engine. Here are some steps you can take:

• Drain the Tank: All of the diesel fuel must be removed from the tank, and you’ll need some fresh gasoline in the tank. You can use the fuel pump to pump out the tank.

• Do Not Operate the Vehicle: By not operating the vehicle, you are avoiding the possibility of sucking up diesel into the fuel line. If you attempt to drive the vehicle with diesel in the engine, your engine could seize and may require extensive repairs as a result.

• Get Professional Help: Immediately call a dealership or local repair shop. Arrange for an emergency tow to get your vehicle to the service center. A mechanic will drain and rinse the gas tank to remove diesel and its residue. If you didn’t start the engine, that’s the only service necessary. However, additional work may be needed if you drove with diesel in the gas tank.