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Old 03-17-2011, 07:04 AM   #3 (permalink)
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Neutral coast downhill with the engine idling, if the grades will allow you to do so.

Highest gear possible for best mileage.

Try inflating the tires to sidewall max.

Coast in neutral with engine running (idle) as much as possible to forced stops.

Vacuum reading in highest gear at 11-12 inches sounds a little low to me but it changes drastically depending on the grades involved.

Make sure the alignemnt is good and no brakes are dragging. Does the car push easy on flat ground?

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