Sorry so long for the answer. I am trying to make my truck as efficient as possible to get my miles per gallon as high as possible, see my site at www.maxmpg.org. I want to take as many parasitic loads off of the engine and power steering is one that's gotta go. Now that I've removed the clutch driven cooling fan and installed a 12v radiator fan, I'm up to an average of 28 mpg in combined city and highway driving. Just highway is above 30 mpg.