Spoiler Advantage?

[Yarii]

I was just wondering if the little optional LB spoiler has any aerodynamic advantage. Specifically does it help keep road dust from sucking up onto the back of the car - luggage racks on older station wagons had this effect by stopping the air stream over the car sticking directly to the roof where it curved down to the tailgate.

[riceboy]

Like most Toyota's the Yaris has a good coefficient of drag.. however I don't think the spoiler really does anything significant.... I have crap all over the car... but I think it's just from dust in the air settling on the car...

[Katana]

Τhe spoiler adds only beauty to the car...

[ellenbetty]

Some older wagons have a air deflector. The air deflector aims the air coming across the roof down upon the rear window. The redirected wind blows the dust off the rear window. But a air deflector does negatively effect fuel economy slightly. I do not know of anyone who makes such a air deflector for a economy hatchback.

[Phaeton]

Actually the spoiler keeps most of the crap off the back window. Before I put mine on the back window was always dirty.