And what does he use for oil?
With 96 K miles on his engine, he said: "I am now using Mobil 15-50w synthetic."
He doesn't change his oil on long rides (3-4 K miles), changes oil filter every other oil change. Favors synthetic because of heat range stability; has observed 240 degrees F. oil temperature. With holes in his skid plate to enhance oil cooling, and his fins, he makes it through hot south Texas summers! On long rides at 5000 + rpm for long distances, no appreciable oil consumption between changes.
Professionally, he used oil analysis for intricate mechanical equipment used by his manufacturer employer, but hasn't had his KLR650 oil analyzed to date.
I'll ask for pictures of his fins and post it here. Over the years, he's consulted with KLR Cary (up to Cary's untimely death), Eagle Mike, and Bill Watt (Thermo-Bob developer); as well as "Aprilia" (Chuck, of Arizona), all acknowledged genuine and authentic KLR authorities (not to diminish the expertise of the competent participants on this forum, whom I respect).