Rotten eggs: This is a strong, pungent smell that is often associated with sulfur. It can be caused by a variety of things, including the presence of hydrogen sulfide gas in the gas, or contamination with bacteria.
Gasoline: This is the smell of raw gasoline, and it can be caused by a fuel leak or a problem with the fuel system.
Varnish: This is a sweet, pungent smell that is often associated with old gas. It can be caused by the breakdown of the hydrocarbons in the gas, or by the presence of impurities.
Burnt oil: This is a sharp, acrid smell that is often associated with engine problems. It can be caused by a variety of things, including low oil levels, a failing oil pump, or worn-out piston rings.
