Quote:
Originally Posted by danhenrie
Not true I just switched to Mobile 0-20 fuel saver went from 32 to 36 city milage havn't seen the effects on the freeway just yet don't travel on it to much
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I agree with you. pumping losses are not the same as viscosity. Viscosity is based on the time it takes for a known volume to drain thru a specified orifice or the equivalent.
Pumping losses are dependent on the power required to move a specified quantity per unit time thru a specified length of 'pipe'
Synthetic oils requitre less hp to pump the same quanity per unit time thru the same 'pipe' compared to paraffin or naphthetic oils. Less hp loss, more mpg.And of course more hp at the drive wheels.