Diesel fuels are rated with a cetane number rather than an octane number. While a higher octane of gasoline indicates resistance to ignition, the higher cetane rating of diesel fuel indicates the ease at which the fuel will ignite. Most number 1 diesel fuels have a cetane rating of 50, while number 2 diesel fuel have a rating of 45. Diesel fuel emissions are higher in sulfur, and lower in carbon monoxide and hydrocarbons than gasoline and are subject to different emission testing standards. Return FUEL TANK Tank location and design are always a compromise with available space.
Most automobiles have a single tank located in the rear of the vehicle.
Fuel tanks today have internal baffles to prevent the fuel from sloshing back and forth. If you hear noises from the rear on acceleration and deceleration the baffles could be broken. All tanks have a fuel filler pipe, a fuel outlet line to the engine and a vent system. All catalytic converter cars are equipped with a filler pipe restrictor so that leaded fuel, which is dispensed from a thicker nozzle, cannot be introduced into the fuel system. All fuel tanks must be vented.