
Originally Posted by
dr. d
the older engines may not be euro-4 compliant, but that does not mean they can not use euro 4 fuel..
it just means, they can use the finest diesel fuels in town, and they still spew out high amounts of pollution in their exhaust.
a euro-4 compliant engine will give out lower, euro-4 levels of exhaust-polluting components, if it is fed euro-4 fuel.
but fed euro-1 or euro-2 fuel, it will still spew out higher levels of polluting exhaust..
older engines may still use the euro-4 fuel, but only the euro-4 compliant engines may fully benefit from its pollution-cutting formulation.