I know make the beast with two backs all about the mechanics of the bike. But I think of it like this: You know how when you watch a tooth paste commercial you see them put on about three times as much tooth paste as you ever would? That's the manufacture's recommended use. You would be spending x3 as much on toothpaste if you did that. Silly and unnecessary.
/most dealerships make their money in the service department not on the showroom floor
A bit off topic but no one has posted here in over a year....
I heard a story that a consultant for a toothpaste manufacturer (Colgate I think) told them that for his following advice he doesn't want any money but given stock in the company. This man is now a multi-millionaire after that deal. His advice: he simply told them that in their TV ads and print ads put a solid tube width of toothpaste over the entire brush and add the curl at the end.
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I'm nearing the need to adjust my valves. I inspected mine at about 8k and as far as I could tell they were within the acceptable range (but it's really difficult to feel the difference in the feeler gauges). I'm close to 15k and thinking I should check it again.