No mythbusters yet...on extreme 4x4 last week he replaced a viscus fan with an electric one and he gained 1.2 miles to the gallon on fuel. this was on a full size 99 or so dodge with the V8


1987 Dodge Ram 50
2.6 5 speed
2 inch body lift 31x11.50 Swamper LTBs
4.62 gears lsd rear and welded front with lockouts
Weber carb waiting to be installed