Japanese Automotive Standards Organization. The primary automotive standards organization in Japan. JASO was created to better address the unique specification needs of Japanese engines. FC oils are defined for low smoke performance and deliver superior performance to JASO FB in terms of exhaust smoke and exhaust system blocking. They are designed for use in two-stroke motorcycles and small engine equipment.
The main physical, chemical and engine test requirements, according to the current version of the standard (JASO M345:2004), for JASO FC oils are shown below:
Physical and Chemical
|The measurement of a fluid's resistance to flow under the force of gravity at a specific temperature, usually 40°C or 100°C. (100°C)||D445/K 2283||mm2/s||6.5 min.|
|Flash Point||D92 or D93/K 2265||°C||70 min.|
|Density (15°C)||D1298/K 2249||g/cm3||Report|
|Pour Point||D97/K 2269||°C||Report|
|Colour (visual inspection)||D1500||Report|
|A product of the combustion of metals commonly found in detergents. As a lubricant property, sulfated ash content is a measure of metal content (usually Zinc, Calcium, and Magnesium) and allows formulators to stay within specified limits in order to minimize the negative effects of abrasive ash particles. Sulfated ash is determined by charring the oil, treating the residue with sulfuric acid, and evaporating to dryness, the result being expressed as % by mass.||D874/K 2272||% mass||0.25 max.|
|Nitrogen||D4629/K 2609-1990||% mass||Report|
|Sulphur||D2662/K 2541-1992||% mass||Report|
Engine Testing (JASO FC)
|Evaluation Item||Test Method||
|Honda Lubricity (LIX)||JASO M 340||95 min.|
|Initial Torque (TIX)||JASO M 340||98 min.|
|Honda Detergency (1 hour) DIX||JASO M 341||95 min.|
|Suzuki Smoke (SIX)||JASO M 342||85 min.|
|Suzuki Blocking (BIX)||JASO M 343||90 min.|
The significance of the index numbers:
The numbers for each evaluated item, i.e., Lubricity, Initial Torque, Detergency, Smoke and Blocking are all index numbers which are associated with performance in each category. Basically, the higher the number, the better the performance in that category.
For more information on JASO FC, contact your Lubrizol representative.