Currently, I have Motul Ester 10W40 in my KLR and have a Blackstone kit waiting for when I drain it. It needs a few hundred more miles yet though. When I get the sample tested I'll try to post up the results to see if it's actually worth $40 gallon.
Just generally, can anyone QUANTIFY in OPERATIONAL TERMS (e.g., comparable miles to major overhaul, hours between malfunctions) the DIFFERENCE between using the WORLD'S BEST MOTORCYCLE OIL and the cheapest, Kawasaki-recommended API Service Code and ambient temperature viscosity oil, in a KLR650?
And . . . has anyone ever suffered the heartbreak of maintenance disaster caused by friction-modified, energy-conserving motor oil (again, within the recommended API service codes and viscosity), with a KLR?
A controversial premise; I doubt the "quality" of lubricating oil (within manufacturer recommendations) is critical on KLR650 engines; don't think it makes much difference, as long as no oil starvation occurs. Granted, I may be thoroughly in error, harboring this notion, and everyone using non-pedigreed oil commits engine abuse with every crankshaft revolution.
Now, PaddyD, as to Motul! True confession, I use Motul ONLY in my KTMs. Why? Because, KTM essentially TELLS me to; has a Motul sticker on the engine case cover! Why, then, can I be so irreverent regarding oil for KLR650 consumption? The KTMs engines, I believe, are built to exceedingly fine clearances and tolerances (my big 'un has three (3) oil pumps, I'm told). With love and respect for KLRs, I doubt they are designed and manufactured to the same high-performance racing specifications of the KTM mills.
Further, I may be buying a little insurance, at least mentally, with the KTMs. KLR650 engine blows; no biggie. KTM engine blows, TAKE OUT A SECOND MORTGAGE!
Now, Motul (at $ 40/gallon) for a KLR650? I'd like to see the QUANTIFIABLE, OPERATIONALLY INTELLIGIBLE maintenance consequence DIFFERENCE between Motul and WalMart's "cheaper spread" before feeding it to mine; YMMV!