[Christ]

Originally Posted by Tygen1

So my Accesory pulleys were makeing a racket, during their replacement I saw the timing belt pulleys were almost dead. Replaced them all and now the motor is much quieter. Anyhow, drving in to work this morning I noticed my SG was reporting a lower GPH than normal on the coasts, around 17 when it is normally around 20. My normal Idle GPH is around 17-18. By the time I got to work I was seeing the idle GPH around 12-13. I'm sure the savings is very small, but the old pulleys must have had quite a bit of friction in the those worn out bearings. I also did about 1mpg better on the way to work, however that is well within the normal variation due to traffic. We'll see if it's a consitant gain. I'm just amazed at the difference in GPH...

Of course it would take less fuel, you're seeing (apparently much) less parasitic losses, thus less load at idle.