JASO FC
Encyclopedia
JASO FC is a performance quality classification for two stroke engine oil, for engines of Japan
ese origin.
Oils are granted the JASO FC certification by the Japanese Automotive Standards Organization
, under the test sequence M345. JASO FC is the highest rating for 2-stroke oils. JASO FC oils leave little deposits and create very little smoke. They also pass lubricant
and detergent
tests. A JASO FC oil will have a rectangular seal. In the upper quarter of the rectangle will be a serial number and the lower three quarters will just have the letters M.
Again, there is an official JASO seal if the oil has been independently tested. The seal is a rectangle; in the upper quarter of the rectangle will be a serial number, and the lower three quarters will just have the letters MA.
JASO FC -has now been superseded as the highest rating by JASO FD.
JASO FA – original spec established regulating lubricity, detergency, initial torque, exhaust smoke and exhaust system blocking.
JASO FB – increased lubricity, detergency, exhaust smoke and exhaust system blocking requirements over FA.
JASO FC – lubricity and initial torque requirements same as FB, however far higher detergency, exhaust smoke and exhaust system blocking requirements over FB.
JASO FD - same as FC with far higher detergency requirement.
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
ese origin.
Oils are granted the JASO FC certification by the Japanese Automotive Standards Organization
Japanese Automotive Standards Organization
The is an organization that sets automotive standards in Japan, analogous tothe Society of Automotive Engineers in the United States. JASO also sets standards for grades of oil; the highest grade for two-stroke engines being JASO FC, and JASO MA for four-stroke engines .JASO is part of the...
, under the test sequence M345. JASO FC is the highest rating for 2-stroke oils. JASO FC oils leave little deposits and create very little smoke. They also pass lubricant
Lubricant
A lubricant is a substance introduced to reduce friction between moving surfaces. It may also have the function of transporting foreign particles and of distributing heat...
and detergent
Detergent
A detergent is a surfactant or a mixture of surfactants with "cleaning properties in dilute solutions." In common usage, "detergent" refers to alkylbenzenesulfonates, a family of compounds that are similar to soap but are less affected by hard water...
tests. A JASO FC oil will have a rectangular seal. In the upper quarter of the rectangle will be a serial number and the lower three quarters will just have the letters M.
Again, there is an official JASO seal if the oil has been independently tested. The seal is a rectangle; in the upper quarter of the rectangle will be a serial number, and the lower three quarters will just have the letters MA.
JASO FC -has now been superseded as the highest rating by JASO FD.
JASO FA – original spec established regulating lubricity, detergency, initial torque, exhaust smoke and exhaust system blocking.
JASO FB – increased lubricity, detergency, exhaust smoke and exhaust system blocking requirements over FA.
JASO FC – lubricity and initial torque requirements same as FB, however far higher detergency, exhaust smoke and exhaust system blocking requirements over FB.
JASO FD - same as FC with far higher detergency requirement.