Aggiungo:
cercando su wikipedia in inglese, mi sono ricordato di una cosa. L'olio minerale é una molecola non polarizzata. Il prodotto della Cstrol Magnatec di qualche anno få ormai, é stato uno dei primi ad usare molecole sintetiche che sono polarizzate e quindi restano a contatto con i metalli piú a lungo prima di staccarsi per sbattimento o scivolare.
Ricordo che é importantissimo che la confezione indichi olio conforme a JASO MA. I recenti oli per auto hanno addittivi modificatori di attrito (usati per ridurre i consumi di carburante nell classi superiori alla API SG) che alterano il normale funzionamento della frizione.
Nei nostri motori motociclistici la sollecitazione massima é dovuta al cambio e non alal lubrificazione del motore. E' lo schiacciamento fra le ruote dentate che puø portare alla seprazione delle molecole. Lo stesso olio che é costretto a lavorare anche nel cambio si "sporca" molto di piú, in quanto nel cambio raccoglie parti ferrose dovute all'usura delle ruote. Il filtro é piccolo e non é centrifugo, ma solo una membrana di carta. Usate solo filtri originali che hanno valvole di sicurezza tarate per il nostro motore e hanno un contenuto di carta filtrante a volte anche doppio di quelli k&n o altri pur costando quasi uguale. Non si guadagna niente cambiando il filtro olio ed il motore dura meno, inoltre in caso di "occlusione" del filtro il motore resta senza olio del tutto.
Per questo gli intervalli di sostituzione delle moto sono moolto piú brevi di quelli auto, principalmente per il filtro olio. Se avessimo anche la trasmissione separata potremmo usare due olii diversi, tipicamente un olio da cambio ha gradazione 80W-90 é quindi un prodotto completamente diverso. Per ovviare a questo problema (molto piú grave nel passato) alcuni produttori usano frizioni a secco.
P.S:
Su wikipedia c'é scritto che la scala arriva fino a 60...
Prob. é vero, ma qualcuno mi trova informazioni "ufficiali" dell'ente di standardizzazione?
--------------------
API é americana:
http://api-ec.api.org
American Petroleum Institute
From Wikipedia, the free encyclopedia
The American Petroleum Institute, commonly referred to as API, is the main U.S. trade association for the oil and natural gas industry, representing more than 400 members involved in all aspects of the industry. API is involved in government relations on behalf of the American oil and natural gas industries. It takes positions on exploration, taxes, trade regulation, environmental regulation, sanctions, industry security and climate change.
API also distributes more than 200,000 publications each year. The publications, technical standards, and electronic and online products are designed to help users improve the efficiency and cost-effectiveness of their operations, comply with legislative and regulatory requirements, and safeguard health, ensure safety, and protect the environment. Each publication is governered by a committee of leading industry professionals. The fact that API's publications are developed by member company engineers and other professionals instead has given rise to it respect and prominence.
For example, API 610 is the specification for centrifugal pumps, API 682 governs mechanical seals, and API 677 is the standard for gear units. API also defines the industry standard for the energy conservation of motor oil. SL is the latest specification to which motor oils should adhere since 2001.
--------------------------------------------
ACEA Europea
http://www.acea.be/
From Wikipedia, the free encyclopedia
The Association des Constructeurs Européens d'Automobiles (European Automobile Manufacturers Association), or ACEA, is the main lobbying group of the automobile industry in the European Union.
--------------------------------------------
SAE
http://www.sae.org
Society of Automotive Engineers
From Wikipedia, the free encyclopedia
The Society of Automotive Engineers is a professional organization and standards body for the engineering of powered vehicles of all kinds, including cars, trucks, boats, aircraft and others.
Starting out as the Society of Automobile Engineers in 1905, their original purpose was to promote the use of standards in the nascent automobile industry (initially in the United States) and to promote the better interchange of ideas and expertise, in a similar manner to many other technical societies.
Although beginnings were modest with only 30 inaugural members (Henry Ford was the inaugural vice-president), numbers grew steadily. Membership reached approximately 1800 by 1916, at which point the society expanded its mission to cover all forms of self-powered transport, including aircraft, boats, agricultural machinery and others. The new word automotive was coined by the Society to describe all self-powered vehicles, and the name was changed.
After World War II the Society established links with other standards bodies and automotive engineering societies worldwide and since then has founded sections in a number of countries formerly lacking such organizations. A quarter of the Society's membership today is from outside of North America.
The SAE has established widely-followed standards in all manner of things automotive, but the most familiar to the average American consumer are its standards for measuring automobile power in units of horsepower (SAE Net Horsepower) generally followed in the USA after the early 1970s, and its engine lubricating oil classification standards.
-------------------------------------
JASO
http://www.jsae.or.jp/index_e.php
Japanese Automotive Standards Organization
From Wikipedia, the free encyclopedia
(Redirected from JASO)
The Japanese Automotive Standards Organization is an orginization that sets automotive standards, much like the Society of Automotive Engineers (SAE) does in the United States.
They also set standards for grades of oil. The highest grade of oil for two-stroke engines is JASO FC, for four-stroke engines (motorcycles) JASO MA.
JASO is part of the Society of Automotive Engineers of Japan (JSAE).
