I had a friend tell me about putting 2 stroke oil in your fuel for added lubrication, since when they went to Low Sulfur fuel took out some of the lubrications from the regular sulfur fuel. So after reading thread after thread about this idea I decided to give it a shot. I went from 16mpg to 17 to 17.5 instantly (I have the average fuel economy display) and my engine got a lot quiter. So If you havent done this I highly recommend. I have a 06 LBZ. and I used 16 oz per tank. Some say use 1 oz to the gallon, but it is just easier to use half of a quart so that way the next fill up you still have 16 oz to put back in it.