Ultra Low Sulfur Diesel for Mechanical Engines

On-Highway Diesel Fuel

Non-Road Diesel Fuels - 49 States

The EPA has mandated the regulations for sulfur content in non-road diesel fuels, to allow emissions control technologies, such as particulate filters and NOX adsorbers to be utilized.

Non-Road Diesel Fuels - California (CARB) Diesel

CARB mandated that by September 1st, 2006, ULSD will be the only type of diesel fuel legal for use with on-highway and non-road applications (except 500 ppm fuel may still be used in locomotives and marine diesel engines).

Kubota's Position Regarding the Use of ULSD

Kubota believes that even with 500 ppm diesel fuel available for non-road use, the potential exists for customers to use ULSD in Kubota engines.

  1. Kubota, through engine testing, has not experienced fuel system component failure related to the use of 15 ppm sulfur ULSD.
  2. Kubota recommends the use of diesel fuel that is refined to appropriate on-highway and off-highway standards.
    1. Kubota cannot be responsible for any fuel system component failures due to inappropriate fuel, incorrect lubricity or fuel additives used.
    2. Appropriate diesel fuel standards include ASTM D975 for lubricity. D975 is a standard that was adopted in 2005 to manage the concern of decreased lubricity as sulfur is removed from diesel fuel.
  3. Kubota is not responsible for loss of power or increase in fuel consumption that could result from the use of ULSD.
    1. According to various sources, a reduction in energy content on the order of 1 - 2% can be expected. This may have a corresponding negative affect on peak power available.
  4. This position is in accordance with Kubota Engine America Service Policy and Warranty Statement dated September 2, 1997.