I followed the manual, step by step and When I drained the oil for the first time on this new (to me) bike only 500 ml came out, maybe less. Thinking I avoided a time bomb I shook the bike around to get any extra oil out buttoned her up and filled her up, Ran her for 3 minutes waited 2 minutes checked the oil and it was almost completely up the dipstick! So I ran her again, checked it again and the same, So I oped the drain plug, dumped some out, checked oil level did this about three times, The last time I just left the bolt out and waited until no more oil came out, I buttoned it up and drove it back to my parking spot, and checked it one last time and it was a little above the full indicator. The math, ~500 ml came out originally, burnt dark oil added 2 liters, 10w-40 Valvoline, a clean amber oil removed another 1.5 liters while trying to get the level to drop, a mix of the two colors. what happened? Ive changed oil before on other bikes and cars, and it was like clock work.