Aero - I worked for almost 10 years at a motorcycle dealer that sells expensive, two-cylinder machines made in Milwaukee. You would be amazed at the number people I have seen who after having spent more than $15,000 for a motorcycle, refuse to pay $4.99 for a quart of 15W50. These guys will not use the oil specified in the owner's manual (Genuine HD or Diesel-rated) but rather go to Auto Zone and buy the $0.99 10W30. Then they come in after 10,000 miles and complain that the bottom end is shot and scream bloody murder when they find out that it's not covered under the warranty. I have seen stuff like this more times than I can remember.

When I saw your post I simply assumed you were one of "them" and for that I apologize. It just really torques me off when I see people who buy nice vehicles and then not take care of them like they are supposed to and I was trying to save you from yourself.

The machine work an metallurgy in cars and bikes today is simply amazing. For example, new Hondas and Fords specify 5W20. That stuff is like water but the clearances are so tight you need something like that to make sure everything gets lubed properly. Another example is BMW. They use a substance called "Nikasil" to line their cylinders with and it is incredibly hard. I once tore down a K75 that had 214,000 miles on it and you could still the crosshatching on the cylinder walls from when it was honed at the factory.

Bob...