The old pulleys appear to be OEM, the replacements are Autozone Duralast (Korean). I'm not to pickey on that sort of stuff, the OEMs for this motor are German, but last just as long as the cheaper stuff, they need to be changed with the belt. The old pulleys were all in pretty bad shape.
I wish I could thourghly document this, but I didn't expect such a big change, so I don't have a reliable base line, just observations. The commute back home showed the same results. Runs smooth and quiet now. The Coasting GPH went as low as 0.14, just amazing to me because it never went below 0.17 before...
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