Standard diesel fuel (sometimes
called diesel oil) comes in two grades: Diesel-1 (D1) and
Diesel-2 (D2). Diesel or Diesel fuel in general is any fuel used
in diesel engines. That’s why it’s also commonly called as AGO or
Automotive Gas Oil. Diesel fuel is a type of fuel derived from
the distillation of oil that is heavier than gasoline but lighter
than engine oil and heavy oil.
D1 is similar to kerosene and is
lighter than D2. While D2 is sold most of the time, D1 is sold
during winter in very cold climates and not sold in hot weather
countries. But D2 is easily available in most countries around
the world. Despite rising awareness of environmental protection,
D2 remains to be a key type of fuel for use in vehicles in many
countries.