RE: What will get better MPG?
LOL well in all ouf our cars, we have seen a difference in MPG. The only thing we don;t have them in are the lawnmowers and weed whackers ha!. That would be quite the test. And a waste of gas lol, just to see who gets better mpg. I can tell you, I drive to work Monday-Friday, and have to fill up every Thursday. He drives twice the distance I do, and fills up every 7 or 8 days.