Engine Oil - Manual says 10W40
Hello, (note: posted this on KLR650.net as well...)
First post here, 1st KLR650 (2008).
The factory manual specifies 10W40 engine oil (API SE, SF, or SG; API SH, SJ, or SL with JASO MA) for my 2008, it seems many are using something heavier, e.g. 20W50. Question is why?
OEM lubrication enigneers spend time and money specifying the vicosities of the oils used these days and design engine components to be compatible, so why vary from the specified oil weight?
Thanks in advance!
It also says these things only make 20 HP @ 4,500 RPM, and 37 ft. lb. TQ @ 5,500 RPM. 20 HP? Really?
Last edited by redfoxco; 05-08-2012 at 05:36 PM.