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Not really an answer to question but i used to use castrol power1 racing 10/40 in my Blade as did many friends, never any issues, but im using silkolene Pro4 plus 5/40 in the T. A pal of mine in the local bike shop told me that so long as you use the correct weight oil and it conforms to JASO MA,MA2 - API SJ then all is good and any warranty issues will be covered, but if you follow Aprilia's recommendation then its top draw Eni i-ride PG racing 5W-40.
- Joined
- Mar 28, 2014
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The Japanese Automotive Standards Organization (JASO) has created their own set of performance and quality standards for petrol engines of Japanese origin.
For four-stroke gasoline engines, the JASO T904 standard is used, and is particularly relevant to motorcycle engines. The JASO T904-MA and MA2 standards are designed to distinguish oils that are approved for wet clutch use, and the JASO T904-MB standard is not suitable for wet clutch use.
For two-stroke gasoline engines, the JASO M345 (FA, FB, FC) standard is used,[18] and this refers particularly to low ash, lubricity, detergency, low smoke and exhaust blocking.
These standards, especially JASO-MA (for motorcycles) and JASO-FC, are designed to address oil-requirement issues not addressed by the API service categories. One element of the JASO-MA standard is a friction test designed to determine suitability for wet clutch usage.[9][19] An oil that meets JASO-MA is considered appropriate for wet clutch operations. Oils marketed as motorcycle-specific will carry the JASO-MA label.
The API service classification is a two-letter code starting with either an "S" for gasoline engines or a "C" for diesel engines. The second letter in the API service classification is very important as it effectively speaks to the model years the engine oil was formulated to serve. As an example, the first API service classification was "SA" and these oils were designed to meet the requirements of cars built prior to 1930. The API SA service classification was followed by SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM and to its current level of API SN.
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