Automotive Engine and transmission are lubricated with different, very specific oils. Typical Operating Range = 700-3500 rpm
Dry-Clutch
Engine
High “Oil Film Retention” Oil is regularly used under high rpm and high-load conditions. Therefore, the oil viscosity deteriorates resulting in a shrinking oil film that could cause engine troubles. The oil must maintain viscosity and have advanced additives for oil film retention.
High “Oxidation Thermal Stability” Motorsport oil must withstand harsh thermal conditions in order to properly and effectively lubricate the engine and transmission. It must be resilient against oil volatility, which is the loss of oil from thermal oxidation and low evaporation properties.
High “Shear Stability” Oil lubricates the engine as well as the transmission gears. The oils used in these applications must be extremely stable against shear.
Motorcycles All-in-one oil provides lubricity for engine, transmission and clutch. Typical Operating Range = 6000-14000 rpm
POWER SPORT OIL NEEDS
Think your bike likes the same oil used in minivans? Motorsports engines run at higher rpm, higher temperatures and deliver more power per cylinder displacement than 99 percent of car engines. Plus, over the years, levels of friction modifier additives have increased in automotive oils, which is good for car efficiency but bad news for motorcycle clutches that require some friction to operate.
Transmission
Wet-Clutch
With or Without “Friction Modifier” Automotive oils use friction modifiers to help offset a portion of the fuel economy lost by mandated reformulated gasoline. These friction modifiers are detrimental to the motorcycle clutch performance and longevity.
* Means Yamalube Standards Exceed JASO MA Standards
10W 7000 max PASS PASS
20W 9500 max PASS PASS FOAMING TENDENCY Seq I 10/0 max PASS PASS
All Yamalube motorcycle oils currently meet or exceed these very important standards for performance. Look for the JASO MA symbol on their bottles.
Evaporative Loss 20% max PASS *Exceeds
In sharp contrast, Yamaha engineers start with an engine, look at its performance demands, measure those against the JASO MA specifications and formulate an oil that meets or exceeds all requirements. This ensures Yamalube JASO MA-certified oils provide maximum protection for Yamaha engines, while still meeting JASO standards. It’s also in the best interest of our customers, who have come to expect high performance and reliability from Yamaha.
JASO MA API Rating Yamalube
JASO MA Since 1998, the Japanese Automotive Standards Organization (JASO) has measured the quality of four stroke motorcycle engine oil. Oils that are JASO MA certified resist clutch slippage, do not leave ashy deposits and meet their anti-corrosion and wear standards.
Not All JASO MA-Certified Formulations are Created Equal. JASO MA is a universal, motorcycle industry oil specification that sets acceptable limits for things like phosphorus, sulphated ash and oil volatility. Oil manufacturers need to meet these specifications in order to achieve JASO MA certification. Unfortunately, in order to meet these specifications, many oil manufacturers will take an existing oil formulation and modify it just enough to qualify for certification—allowing them to maximize profits.
Phosphorus Content 0.08 min-0.12 max FAIL *Exceeds
Seq II 50/0 max PASS PASS Seq III 10/0 max PASS PASS FRICTION PROTECTION xW-30 9.0 min not tested *Exceeds xW-40 12.0 min not tested *Exceeds
Static Friction =1.15 - <2.50 not tested PASS
Stop Time =1.55 - <2.50 not tested PASS CCS VISCOSITY 5W 6600 max PASS PASS
Sulfated Ash 1.2% mass not tested *Exceeds
The JASO MA certification is for high-friction applications such as motorcycles.
Welcome to JASO 101. Over the years, oil manufacturers have had to reduce the levels of zinc, phosphorus and other extreme pressure additives due to the potential harmful effects they have on component longevity. Under pressure from automakers, they’ve also added friction modifiers while reducing viscosity grades to pace increased emission warranty coverage periods. While these modifications have helped to offset cars’ reduced mpg due to reformulated fuels, they’ve also had the negative effect of reducing gear and clutch durability and performance of four stroke motorcycle engines and transmissions.
WET CLUTCH TEST Dynamic Friction =1.45 - <2.50 not tested PASS
xW-50 15.0 min not tested PASS HTHS 2.9 min PASS *Exceeds
Yamalube Means Performance Automotive Motorcycle Comparison
Yamalube Standards
YAMALVBE G JASO