New Four-stroke Diesel Engine Oil Standards for Japanese Market: JASO DH-2 and DL-1 2005-01-3718
This paper reviews the development of the new four-stroke diesel engine oil standards, JASO DH-2 and DL-1 (JASO M335-05) for Japanese automotive diesel engines equipped with after treatment devices, e.g. Diesel Particulate Filter (DPF) to meet the new long-term emissions regulations. These standards have been introduced in Japan in April 2005. The standards prescribe the minimum performance for engine oils conforming to Japan-made four-stroke diesel engines with aftertreatment devices using low sulfur diesel fuel (less than or equal to 0.005 mass % sulfur).
The engine test requirements for these new standards are basically the same as those of the JASO DH-1 automotive diesel engine oil standard (JASO M-355 2000) to meet engine oil performances with soot dispersancy (ASTM D 5967-99), piston detergency (JASO M336-98), thermal and oxidation stability (ASTM Seq. IIIE and IIIF), and anti-wear performance (JASO M354-99). The specified bench tests measure hot surface deposit control, anti-foaming, volatility, anti-corrosion, shear-stability, base number, and seal compatibility. Limits for chemical elements and sulfated ash are newly set to protect aftertreatment devices.
Takashi Hoshino, Koichi Kubo, K. Nakamura, M. Yamashita, T. Hashimoto, K. Tomizawa, T. Ukai, S. Iwamoto, H. Yamamoto, Y. Naitoh, H. Yashima, K. Ueda, S. Nemoto, T. Ishikawa, K. Yamada, T. Suzuki, T. Negishi, K. Kotaka, K. Takeoka, K. Takagi, M. Okubo, K. Yasuda, T. Kamitamari, K. Tawa
Diesel Oil Working Group of PAJ/JAMA Engine Oil Subcommittee
Powertrain & Fluid Systems Conference & Exhibition
SAE 2005 Transactions Journal of Fuels and Lubricants-V114-4