I suspected I had an oil leak on my '05 RK, since I saw residue on the frame and I had to add less than a quart of Mobil 1 Synthetic. I have about 2500 miles since my oil change. Dealer said Harley claims it's normal. The tech said to lose the synthetic and go to dino oil for about 2500 more miles to seat valves. "It's almost too good an oil" were his words. I have approx 13,000 miles on this bike and it's still covered under warranty. What do you guys say?