can a car use kerosene

[SanKaleb]

No, you should not put kerosene in a car's gasoline or diesel engine. While kerosene is a fuel, its chemical properties are not compatible with modern automotive engines. Using it can lead to immediate performance issues and severe, costly long-term damage. Kerosene lacks the lubricity of diesel fuel, which can destroy a diesel engine's high-pressure fuel pump and injectors. In a gasoline engine, its low octane rating can cause violent knocking and piston damage. It also burns less efficiently, producing higher emissions and potentially clogging the vehicle's emission control systems like the catalytic converter.

The core issue lies in the different refining processes and intended applications. Automotive fuels are engineered with specific additives for engine protection and efficiency. The following table compares key properties:

Fuel Property	Gasoline	Diesel Fuel	Kerosene (for reference)	Why it Matters
Octane Rating (Anti-Knock)	87-93 (AKI)	Not Applicable	~15-25	Prevents engine knocking in gasoline engines. Kerosene's low rating causes damage.
Cetane Rating (Ignition)	Not Applicable	40-55	~25-40	Governs ignition delay in diesel engines. Lower cetane leads to rough operation.
Lubricity	Low	High (with additives)	Very Low	Protects fuel pumps & injectors. Kerosene's lack of lubricity causes rapid wear.
Viscosity	Low	Higher	Low	Affects fuel atomization. Incorrect viscosity leads to poor combustion and smoke.
Flash Point	-43°C (-45°F)	> 52°C (125°F)	38-72°C (100-162°F)	Safety indicator. Kerosene's flash point varies, posing a storage and handling risk.
Primary Use	Spark-Ignition Engines	Compression-Ignition Engines	Heating, Jet Fuel, Lamps	Engineered for specific systems, not interchangeable.

If you're considering kerosene due to an emergency or fuel shortage, it is a far safer bet to use official, approved alternatives. For a diesel engine, specific emergency fuel additives can sometimes be used, but consulting the owner's manual is critical. In a true pinch, a very small amount of pure kerosene (e.g., less than 10%) mixed with diesel might be tolerated by older, mechanically controlled diesel engines, but this is a risky last resort and not recommended for modern engines with complex emission systems. The potential for thousands of dollars in repairs far outweighs any perceived short-term benefit.

[StMicah]

Don't even think about it. I've seen what happens. In a diesel truck, kerosene is like running sand through your fuel system. It'll wipe out the injectors and pump because it doesn't have the slickness diesel does. In a gas car, it'll run like garbage, knock like crazy, and you might kill the catalytic converter. It's just not worth destroying your engine over. Use the right fuel.

[MatthewRose]

Financially, it's a terrible decision. The initial cost savings of kerosene are completely erased by the damage it causes. You'd be looking at a fuel system replacement costing several thousand dollars for a modern diesel, or a new catalytic converter and potential engine work for a gasoline car. The risk of a massive repair bill makes any potential savings irrelevant. Always use the recommended fuel to protect your investment.

[DelJohn]

My granddad used to talk about the old days on the farm, running a tractor on just about anything that would burn. But that was a simple, low-compression engine from a different era. Today's engines are like precision watches, with computers managing everything. They need the exact fuel they were designed for. What worked in a 1950s tractor will destroy a 2020s car. The technology has moved on, and so should our fueling habits.

[JonathanLynn]

The main concern is safety and engine compatibility. Kerosene has different burning characteristics and a higher flash point than gasoline, meaning it might not vaporize or ignite properly in your car's engine, leading to stalling or failure to start. It also isn't formulated with the necessary detergents and lubricants that keep your fuel system clean and protected. Using it even once can lead to poor performance, increased harmful emissions, and trigger your check engine light due to sensor readings being out of spec.