Main Motorcycle: Daytona 955i
Join Date: Mar 2010
Other Motorcycle: FZR 1000 Genesis
Extra Motorcycle: FZ750
|Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.|
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You can, yes. However, if you haven't had the gaskets off for a while they will probably leak due to the detergent in the oil breaking up the residue from the old oil. This got synthetic oil a bad name because people had badly maintained bikes...
Many people will dispute this but at the end of the day, synthetic literally means it's the pure form of dinosaur oil built in a lab rather than mined. It basically doesn't have the rubbish in it. There are some arguments about Zinc content and stuff with old bikes but I can't personally find any evidence to support this being an actual fact.
Rotella T oil for my 2005 Thruxton and also T6 Synthetic. Both cheaper in price than the crazy expensive other brands like Mobil 1.
Though marketed as an engine oil for diesel trucks, Rotella oil has found popularity with motorcyclists as well. The lack of "friction modifiers" in Rotella means they do not interfere with wet clutch operations. (This is called a "shared sump" design, which is unlike automobiles which maintain separate oil reservoirs - one for the engine and one for the transmission). Used oil analysis (UOA) reports on BobIsTheOilGuy.com have shown wear metals levels comparable to oils marketed as motorcycle-specific.
JASO is an acronym that stands for "The Japanese Automotive Standards Organization." Among other things, they set standards for oil to be used in motorcycles.
Shell Rotella T 15W-40 conventional oil does not list on its packaging JASO MA as one of the specifications it meets. Note that the 10W-30 conventional oil does not list JASO-MA.
The newer fully synthetic T6 5W-40 oil lists JASO-MA compliance on its packaging and on the Rotella website.
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