The most that will happen if you put mixed gas in a regular fuel engine is (depends on how much mix is but ) it will smoke out the exhaust and fowl the spark plug or may not run at all.
When you mix regular unleaded fuel and unleaded plus fuel in a gas tank it results in a mixture of fuel with an octane rating higher that regular unleaded fuel but lower than the octane rating of unleaded plus fuel.
The 3800 engines with the superchargers require premium gas. Higher octane fuel prevents engine from self ignition of oxygen and gas causing engine misfire.
Yes, this engine requires Premium fuel. Using Regular fuel will cause pinging and engine damage.
Mixing diesel fuel with regular gasoline in your lawnmower can lead to significant engine problems. Diesel fuel has a different combustion process than gasoline, which can cause the engine to run poorly, misfire, or even stall. Additionally, it can damage fuel system components and create residue buildup. If this happens, it's advisable to drain the fuel system and replace it with the correct fuel type to prevent further issues.
Diesel gas gives more mileage (miles per gallon) than regular gasoline. You must, of course, have a vehicle that has a diesel engine because diesel fuel cannot be used in an engine that runs on regular gas! Depending on local government taxation policies, in some countries diesel is cheaper to buy than regular gas whilst in other countries it is more expensive! Diesel fuel is thicker and "stickier" than regular gas so, if a vehicle's fuel system ever needs cleaning - fuel tank, fuel lines, fuel pumps and fuel injectors - it is a more difficult and expensive job to do on a diesel vehicle.
the engine will lock up
Empty your tank out, drain the fuel lines, as the gasoline will damage your diesel engine.
You will get poor fuel economy and reduced power.
Drain the tank, change the fuel filter, refill with diesel.
You will lose all lubrication to the engine, and if you run the engine long enough you will have catostrophic engine failure.
If you did not start the engine no harm has been done. Drain the fuel tank, and all the fuel lines. Get as much of the gas out as possible. Fill it up with diesel and you should be ok.
no/poor gas flow to the engine. Results in stalling/stammerring motor.