What's so odd about the fuel economy going down when the humidity goes up?

More moisture in the air means less dense air for the engine to breath.. Wait until a cold winter day when there's no snow to mush through.. Your engine will REALLY love it and if you're lucky enough to get a non-oxygenated fuel, your mileage will increase..

Now you Phoenix folks - well, yeah - you're hozed...

Regards - Randy




If there's one thing I've learned in online forums its this:
Never argue with an idiot, they'll drag you down to their level and beat you with experience!