Apparently some engines now have a solenoid-operated shroud that pops up to surround the water pump impeller, so if the coolant is still warming up it doesn't circulate. This is supposed to reduce the parasitic load on the engine from the ancillaries.

I can't help but think that the water pump must require about 3 brake gerbil power to turn, and the weight of the solenoid, plunger, spring, shroud, and extra cabling - not to mention more seals to go hard and leak - probably takes more power to haul around.

I don't really care about a car's 0-60 time or fractions of a mile per gallon. If you want to save fuel, lighten your right foot.

I want the car to be simple enough to be reliable and repairable when it eventually does go wrong.