Gas
* Also known as petrol
* Gasoline
* Used in spark-ignition engines
* Lighter and less dense than diesel
* Higher octane rating
* Burns faster and creates more power
* Less fuel-efficient
* Produces more emissions
Diesel
* Used in compression-ignition engines
* Heavier and more dense than gas
* Lower octane rating
* Burns slower and creates less power
* More fuel-efficient
* Produces fewer emissions
In general, gas is better for cars and other light-duty vehicles, while diesel is better for trucks, buses, and other heavy-duty vehicles.
