Went to do a little work on the Cruiser today and decided to check the oil. Was down 1.5 quarts or so - never happended before. However, I've been noticing a problem with it blowing black crap out of the exhaust pipe upon startup, usually all over the side of my wife's white Jetta. She loves that by the way. The black crap appears to be oily? Smears pretty bad when you go to wipe it off with your finger. The 2F supposedly has 106,000 miles on it according to the PO. I have had it for 9 months or so, and just changed the weight of the motor oil from 5w-30 to 10w-40 at the last oil change and the problem seems more predominant now. Could it be blowing oil out of the exhaust pipe? Is this what is commonly referred to as "blow by"? If so, how much time do I have before a rebuild is needed? ???